21312225

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 42556800

約数和(自身を除く): 21244575

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 79, 99, 109, 165, 225, 237, 275, 327, 395, 495, 545, 711, 825, 869, 981, 1185, 1199, 1635, 1975, 2475, 2607, 2725, 3555, 3597, 4345, 4905, 5925, 5995, 7821, 8175, 8611, 10791, 13035, 17775, 17985, 21725, 24525, 25833, 29975, 39105, 43055, 53955, 65175, 77499, 89925, 94721, 129165, 195525, 215275, 269775, 284163, 387495, 473605, 645825, 852489, 1420815, 1937475, 2368025, 4262445, 7104075, 21312225]

約数ペア:

[(1, 21312225), (3, 7104075), (5, 4262445), (9, 2368025), (11, 1937475), (15, 1420815), (25, 852489), (33, 645825), (45, 473605), (55, 387495), (75, 284163), (79, 269775), (99, 215275), (109, 195525), (165, 129165), (225, 94721), (237, 89925), (275, 77499), (327, 65175), (395, 53955), (495, 43055), (545, 39105), (711, 29975), (825, 25833), (869, 24525), (981, 21725), (1185, 17985), (1199, 17775), (1635, 13035), (1975, 10791), (2475, 8611), (2607, 8175), (2725, 7821), (3555, 5995), (3597, 5925), (4345, 4905)]