20985660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:212

約数の個数: 144

約数和(自身を含む): 68717376

約数和(自身を除く): 47731716

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 37, 45, 46, 60, 69, 74, 90, 92, 111, 115, 137, 138, 148, 180, 185, 207, 222, 230, 274, 276, 333, 345, 370, 411, 414, 444, 460, 548, 555, 666, 685, 690, 740, 822, 828, 851, 1035, 1110, 1233, 1332, 1370, 1380, 1644, 1665, 1702, 2055, 2070, 2220, 2466, 2553, 2740, 3151, 3330, 3404, 4110, 4140, 4255, 4932, 5069, 5106, 6165, 6302, 6660, 7659, 8220, 8510, 9453, 10138, 10212, 12330, 12604, 12765, 15207, 15318, 15755, 17020, 18906, 20276, 24660, 25345, 25530, 28359, 30414, 30636, 31510, 37812, 38295, 45621, 47265, 50690, 51060, 56718, 60828, 63020, 76035, 76590, 91242, 94530, 101380, 113436, 116587, 141795, 152070, 153180, 182484, 189060, 228105, 233174, 283590, 304140, 349761, 456210, 466348, 567180, 582935, 699522, 912420, 1049283, 1165870, 1399044, 1748805, 2098566, 2331740, 3497610, 4197132, 5246415, 6995220, 10492830, 20985660]

約数ペア:

[(1, 20985660), (2, 10492830), (3, 6995220), (4, 5246415), (5, 4197132), (6, 3497610), (9, 2331740), (10, 2098566), (12, 1748805), (15, 1399044), (18, 1165870), (20, 1049283), (23, 912420), (30, 699522), (36, 582935), (37, 567180), (45, 466348), (46, 456210), (60, 349761), (69, 304140), (74, 283590), (90, 233174), (92, 228105), (111, 189060), (115, 182484), (137, 153180), (138, 152070), (148, 141795), (180, 116587), (185, 113436), (207, 101380), (222, 94530), (230, 91242), (274, 76590), (276, 76035), (333, 63020), (345, 60828), (370, 56718), (411, 51060), (414, 50690), (444, 47265), (460, 45621), (548, 38295), (555, 37812), (666, 31510), (685, 30636), (690, 30414), (740, 28359), (822, 25530), (828, 25345), (851, 24660), (1035, 20276), (1110, 18906), (1233, 17020), (1332, 15755), (1370, 15318), (1380, 15207), (1644, 12765), (1665, 12604), (1702, 12330), (2055, 10212), (2070, 10138), (2220, 9453), (2466, 8510), (2553, 8220), (2740, 7659), (3151, 6660), (3330, 6302), (3404, 6165), (4110, 5106), (4140, 5069), (4255, 4932)]