21342375

素因数分解:

$3^2\times 5^3\times {\mathrm{61}}^1\times {\mathrm{311}}^1$

素因数の和:393

約数の個数: 48

約数和(自身を含む): 39229632

約数和(自身を除く): 17887257

約数列:

[1, 3, 5, 9, 15, 25, 45, 61, 75, 125, 183, 225, 305, 311, 375, 549, 915, 933, 1125, 1525, 1555, 2745, 2799, 4575, 4665, 7625, 7775, 13725, 13995, 18971, 22875, 23325, 38875, 56913, 68625, 69975, 94855, 116625, 170739, 284565, 349875, 474275, 853695, 1422825, 2371375, 4268475, 7114125, 21342375]

約数ペア:

[(1, 21342375), (3, 7114125), (5, 4268475), (9, 2371375), (15, 1422825), (25, 853695), (45, 474275), (61, 349875), (75, 284565), (125, 170739), (183, 116625), (225, 94855), (305, 69975), (311, 68625), (375, 56913), (549, 38875), (915, 23325), (933, 22875), (1125, 18971), (1525, 13995), (1555, 13725), (2745, 7775), (2799, 7625), (4575, 4665)]