18219975625

素因数分解:

$5^4\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:332

約数の個数: 80

約数和(自身を含む): 24097886208

約数和(自身を除く): 5877910583

約数列:

[1, 5, 25, 53, 61, 71, 125, 127, 265, 305, 355, 625, 635, 1325, 1525, 1775, 3175, 3233, 3763, 4331, 6625, 6731, 7625, 7747, 8875, 9017, 15875, 16165, 18815, 21655, 33125, 33655, 38125, 38735, 44375, 45085, 79375, 80825, 94075, 108275, 168275, 193675, 225425, 229543, 404125, 410591, 470375, 477901, 541375, 550037, 841375, 968375, 1127125, 1147715, 2020625, 2052955, 2351875, 2389505, 2706875, 2750185, 4206875, 4841875, 5635625, 5738575, 10264775, 11947525, 13750925, 28692875, 29151961, 51323875, 59737625, 68754625, 143464375, 145759805, 256619375, 298688125, 343773125, 728799025, 3643995125, 18219975625]

約数ペア:

[(1, 18219975625), (5, 3643995125), (25, 728799025), (53, 343773125), (61, 298688125), (71, 256619375), (125, 145759805), (127, 143464375), (265, 68754625), (305, 59737625), (355, 51323875), (625, 29151961), (635, 28692875), (1325, 13750925), (1525, 11947525), (1775, 10264775), (3175, 5738575), (3233, 5635625), (3763, 4841875), (4331, 4206875), (6625, 2750185), (6731, 2706875), (7625, 2389505), (7747, 2351875), (8875, 2052955), (9017, 2020625), (15875, 1147715), (16165, 1127125), (18815, 968375), (21655, 841375), (33125, 550037), (33655, 541375), (38125, 477901), (38735, 470375), (44375, 410591), (45085, 404125), (79375, 229543), (80825, 225425), (94075, 193675), (108275, 168275)]