21007875

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:229

約数の個数: 64

約数和(自身を含む): 40974336

約数和(自身を除く): 19966461

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 53, 75, 105, 125, 151, 159, 175, 265, 371, 375, 453, 525, 755, 795, 875, 1057, 1113, 1325, 1855, 2265, 2625, 3171, 3775, 3975, 5285, 5565, 6625, 8003, 9275, 11325, 15855, 18875, 19875, 24009, 26425, 27825, 40015, 46375, 56021, 56625, 79275, 120045, 132125, 139125, 168063, 200075, 280105, 396375, 600225, 840315, 1000375, 1400525, 3001125, 4201575, 7002625, 21007875]

約数ペア:

[(1, 21007875), (3, 7002625), (5, 4201575), (7, 3001125), (15, 1400525), (21, 1000375), (25, 840315), (35, 600225), (53, 396375), (75, 280105), (105, 200075), (125, 168063), (151, 139125), (159, 132125), (175, 120045), (265, 79275), (371, 56625), (375, 56021), (453, 46375), (525, 40015), (755, 27825), (795, 26425), (875, 24009), (1057, 19875), (1113, 18875), (1325, 15855), (1855, 11325), (2265, 9275), (2625, 8003), (3171, 6625), (3775, 5565), (3975, 5285)]