21981750

素因数分解:

$2^1\times 3^1\times 5^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:159

約数の個数: 128

約数和(自身を含む): 64696320

約数和(自身を除く): 42714570

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 42, 50, 53, 70, 75, 79, 105, 106, 125, 150, 158, 159, 175, 210, 237, 250, 265, 318, 350, 371, 375, 395, 474, 525, 530, 553, 742, 750, 790, 795, 875, 1050, 1106, 1113, 1185, 1325, 1590, 1659, 1750, 1855, 1975, 2226, 2370, 2625, 2650, 2765, 3318, 3710, 3950, 3975, 4187, 5250, 5530, 5565, 5925, 6625, 7950, 8295, 8374, 9275, 9875, 11130, 11850, 12561, 13250, 13825, 16590, 18550, 19750, 19875, 20935, 25122, 27650, 27825, 29309, 29625, 39750, 41475, 41870, 46375, 55650, 58618, 59250, 62805, 69125, 82950, 87927, 92750, 104675, 125610, 138250, 139125, 146545, 175854, 207375, 209350, 278250, 293090, 314025, 414750, 439635, 523375, 628050, 732725, 879270, 1046750, 1465450, 1570125, 2198175, 3140250, 3663625, 4396350, 7327250, 10990875, 21981750]

約数ペア:

[(1, 21981750), (2, 10990875), (3, 7327250), (5, 4396350), (6, 3663625), (7, 3140250), (10, 2198175), (14, 1570125), (15, 1465450), (21, 1046750), (25, 879270), (30, 732725), (35, 628050), (42, 523375), (50, 439635), (53, 414750), (70, 314025), (75, 293090), (79, 278250), (105, 209350), (106, 207375), (125, 175854), (150, 146545), (158, 139125), (159, 138250), (175, 125610), (210, 104675), (237, 92750), (250, 87927), (265, 82950), (318, 69125), (350, 62805), (371, 59250), (375, 58618), (395, 55650), (474, 46375), (525, 41870), (530, 41475), (553, 39750), (742, 29625), (750, 29309), (790, 27825), (795, 27650), (875, 25122), (1050, 20935), (1106, 19875), (1113, 19750), (1185, 18550), (1325, 16590), (1590, 13825), (1659, 13250), (1750, 12561), (1855, 11850), (1975, 11130), (2226, 9875), (2370, 9275), (2625, 8374), (2650, 8295), (2765, 7950), (3318, 6625), (3710, 5925), (3950, 5565), (3975, 5530), (4187, 5250)]