21497925

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 37394432

約数和(自身を除く): 15896507

約数列:

[1, 3, 5, 15, 25, 37, 61, 75, 111, 127, 183, 185, 305, 381, 555, 635, 915, 925, 1525, 1905, 2257, 2775, 3175, 4575, 4699, 6771, 7747, 9525, 11285, 14097, 23241, 23495, 33855, 38735, 56425, 70485, 116205, 117475, 169275, 193675, 286639, 352425, 581025, 859917, 1433195, 4299585, 7165975, 21497925]

約数ペア:

[(1, 21497925), (3, 7165975), (5, 4299585), (15, 1433195), (25, 859917), (37, 581025), (61, 352425), (75, 286639), (111, 193675), (127, 169275), (183, 117475), (185, 116205), (305, 70485), (381, 56425), (555, 38735), (635, 33855), (915, 23495), (925, 23241), (1525, 14097), (1905, 11285), (2257, 9525), (2775, 7747), (3175, 6771), (4575, 4699)]