21393720

素因数分解:

$2^3\times 3^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:128

約数の個数: 192

約数和(自身を含む): 75479040

約数和(自身を除く): 54085320

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 31, 36, 40, 45, 54, 60, 62, 71, 72, 81, 90, 93, 108, 120, 124, 135, 142, 155, 162, 180, 186, 213, 216, 243, 248, 270, 279, 284, 310, 324, 355, 360, 372, 405, 426, 465, 486, 540, 558, 568, 620, 639, 648, 710, 744, 810, 837, 852, 930, 972, 1065, 1080, 1116, 1215, 1240, 1278, 1395, 1420, 1620, 1674, 1704, 1860, 1917, 1944, 2130, 2201, 2232, 2430, 2511, 2556, 2790, 2840, 3195, 3240, 3348, 3720, 3834, 4185, 4260, 4402, 4860, 5022, 5112, 5580, 5751, 6390, 6603, 6696, 7533, 7668, 8370, 8520, 8804, 9585, 9720, 10044, 11005, 11160, 11502, 12555, 12780, 13206, 15066, 15336, 16740, 17253, 17608, 19170, 19809, 20088, 22010, 23004, 25110, 25560, 26412, 28755, 30132, 33015, 33480, 34506, 37665, 38340, 39618, 44020, 46008, 50220, 52824, 57510, 59427, 60264, 66030, 69012, 75330, 76680, 79236, 86265, 88040, 99045, 100440, 115020, 118854, 132060, 138024, 150660, 158472, 172530, 178281, 198090, 230040, 237708, 264120, 297135, 301320, 345060, 356562, 396180, 475416, 534843, 594270, 690120, 713124, 792360, 891405, 1069686, 1188540, 1426248, 1782810, 2139372, 2377080, 2674215, 3565620, 4278744, 5348430, 7131240, 10696860, 21393720]

約数ペア:

[(1, 21393720), (2, 10696860), (3, 7131240), (4, 5348430), (5, 4278744), (6, 3565620), (8, 2674215), (9, 2377080), (10, 2139372), (12, 1782810), (15, 1426248), (18, 1188540), (20, 1069686), (24, 891405), (27, 792360), (30, 713124), (31, 690120), (36, 594270), (40, 534843), (45, 475416), (54, 396180), (60, 356562), (62, 345060), (71, 301320), (72, 297135), (81, 264120), (90, 237708), (93, 230040), (108, 198090), (120, 178281), (124, 172530), (135, 158472), (142, 150660), (155, 138024), (162, 132060), (180, 118854), (186, 115020), (213, 100440), (216, 99045), (243, 88040), (248, 86265), (270, 79236), (279, 76680), (284, 75330), (310, 69012), (324, 66030), (355, 60264), (360, 59427), (372, 57510), (405, 52824), (426, 50220), (465, 46008), (486, 44020), (540, 39618), (558, 38340), (568, 37665), (620, 34506), (639, 33480), (648, 33015), (710, 30132), (744, 28755), (810, 26412), (837, 25560), (852, 25110), (930, 23004), (972, 22010), (1065, 20088), (1080, 19809), (1116, 19170), (1215, 17608), (1240, 17253), (1278, 16740), (1395, 15336), (1420, 15066), (1620, 13206), (1674, 12780), (1704, 12555), (1860, 11502), (1917, 11160), (1944, 11005), (2130, 10044), (2201, 9720), (2232, 9585), (2430, 8804), (2511, 8520), (2556, 8370), (2790, 7668), (2840, 7533), (3195, 6696), (3240, 6603), (3348, 6390), (3720, 5751), (3834, 5580), (4185, 5112), (4260, 5022), (4402, 4860)]