21651525

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{233}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 45264960

約数和(自身を除く): 23613435

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 59, 63, 75, 105, 175, 177, 225, 233, 295, 315, 413, 525, 531, 699, 885, 1165, 1239, 1475, 1575, 1631, 2065, 2097, 2655, 3495, 3717, 4425, 4893, 5825, 6195, 8155, 10325, 10485, 13275, 13747, 14679, 17475, 18585, 24465, 30975, 40775, 41241, 52425, 68735, 73395, 92925, 96229, 122325, 123723, 206205, 288687, 343675, 366975, 481145, 618615, 866061, 1031025, 1443435, 2405725, 3093075, 4330305, 7217175, 21651525]

約数ペア:

[(1, 21651525), (3, 7217175), (5, 4330305), (7, 3093075), (9, 2405725), (15, 1443435), (21, 1031025), (25, 866061), (35, 618615), (45, 481145), (59, 366975), (63, 343675), (75, 288687), (105, 206205), (175, 123723), (177, 122325), (225, 96229), (233, 92925), (295, 73395), (315, 68735), (413, 52425), (525, 41241), (531, 40775), (699, 30975), (885, 24465), (1165, 18585), (1239, 17475), (1475, 14679), (1575, 13747), (1631, 13275), (2065, 10485), (2097, 10325), (2655, 8155), (3495, 6195), (3717, 5825), (4425, 4893)]