21138840

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{23}}^2\times {\mathrm{37}}^1$

素因数の和:103

約数の個数: 192

約数和(自身を含む): 75650400

約数和(自身を除く): 54511560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 23, 24, 27, 30, 36, 37, 40, 45, 46, 54, 60, 69, 72, 74, 90, 92, 108, 111, 115, 120, 135, 138, 148, 180, 184, 185, 207, 216, 222, 230, 270, 276, 296, 333, 345, 360, 370, 414, 444, 460, 529, 540, 552, 555, 621, 666, 690, 740, 828, 851, 888, 920, 999, 1035, 1058, 1080, 1110, 1242, 1332, 1380, 1480, 1587, 1656, 1665, 1702, 1998, 2070, 2116, 2220, 2484, 2553, 2645, 2664, 2760, 3105, 3174, 3330, 3404, 3996, 4140, 4232, 4255, 4440, 4761, 4968, 4995, 5106, 5290, 6210, 6348, 6660, 6808, 7659, 7935, 7992, 8280, 8510, 9522, 9990, 10212, 10580, 12420, 12696, 12765, 13320, 14283, 15318, 15870, 17020, 19044, 19573, 19980, 20424, 21160, 22977, 23805, 24840, 25530, 28566, 30636, 31740, 34040, 38088, 38295, 39146, 39960, 45954, 47610, 51060, 57132, 58719, 61272, 63480, 71415, 76590, 78292, 91908, 95220, 97865, 102120, 114264, 114885, 117438, 142830, 153180, 156584, 176157, 183816, 190440, 195730, 229770, 234876, 285660, 293595, 306360, 352314, 391460, 459540, 469752, 528471, 571320, 587190, 704628, 782920, 880785, 919080, 1056942, 1174380, 1409256, 1761570, 2113884, 2348760, 2642355, 3523140, 4227768, 5284710, 7046280, 10569420, 21138840]

約数ペア:

[(1, 21138840), (2, 10569420), (3, 7046280), (4, 5284710), (5, 4227768), (6, 3523140), (8, 2642355), (9, 2348760), (10, 2113884), (12, 1761570), (15, 1409256), (18, 1174380), (20, 1056942), (23, 919080), (24, 880785), (27, 782920), (30, 704628), (36, 587190), (37, 571320), (40, 528471), (45, 469752), (46, 459540), (54, 391460), (60, 352314), (69, 306360), (72, 293595), (74, 285660), (90, 234876), (92, 229770), (108, 195730), (111, 190440), (115, 183816), (120, 176157), (135, 156584), (138, 153180), (148, 142830), (180, 117438), (184, 114885), (185, 114264), (207, 102120), (216, 97865), (222, 95220), (230, 91908), (270, 78292), (276, 76590), (296, 71415), (333, 63480), (345, 61272), (360, 58719), (370, 57132), (414, 51060), (444, 47610), (460, 45954), (529, 39960), (540, 39146), (552, 38295), (555, 38088), (621, 34040), (666, 31740), (690, 30636), (740, 28566), (828, 25530), (851, 24840), (888, 23805), (920, 22977), (999, 21160), (1035, 20424), (1058, 19980), (1080, 19573), (1110, 19044), (1242, 17020), (1332, 15870), (1380, 15318), (1480, 14283), (1587, 13320), (1656, 12765), (1665, 12696), (1702, 12420), (1998, 10580), (2070, 10212), (2116, 9990), (2220, 9522), (2484, 8510), (2553, 8280), (2645, 7992), (2664, 7935), (2760, 7659), (3105, 6808), (3174, 6660), (3330, 6348), (3404, 6210), (3996, 5290), (4140, 5106), (4232, 4995), (4255, 4968), (4440, 4761)]