20455020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{5981}}^1$

素因数の和:6015

約数の個数: 72

約数和(自身を含む): 65323440

約数和(自身を除く): 44868420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 570, 684, 855, 1140, 1710, 3420, 5981, 11962, 17943, 23924, 29905, 35886, 53829, 59810, 71772, 89715, 107658, 113639, 119620, 179430, 215316, 227278, 269145, 340917, 358860, 454556, 538290, 568195, 681834, 1022751, 1076580, 1136390, 1363668, 1704585, 2045502, 2272780, 3409170, 4091004, 5113755, 6818340, 10227510, 20455020]

約数ペア:

[(1, 20455020), (2, 10227510), (3, 6818340), (4, 5113755), (5, 4091004), (6, 3409170), (9, 2272780), (10, 2045502), (12, 1704585), (15, 1363668), (18, 1136390), (19, 1076580), (20, 1022751), (30, 681834), (36, 568195), (38, 538290), (45, 454556), (57, 358860), (60, 340917), (76, 269145), (90, 227278), (95, 215316), (114, 179430), (171, 119620), (180, 113639), (190, 107658), (228, 89715), (285, 71772), (342, 59810), (380, 53829), (570, 35886), (684, 29905), (855, 23924), (1140, 17943), (1710, 11962), (3420, 5981)]