21688550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{547}}^1$

素因数の和:633

約数の個数: 48

約数和(自身を含む): 44236752

約数和(自身を除く): 22548202

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 61, 65, 122, 130, 305, 325, 547, 610, 650, 793, 1094, 1525, 1586, 2735, 3050, 3965, 5470, 7111, 7930, 13675, 14222, 19825, 27350, 33367, 35555, 39650, 66734, 71110, 166835, 177775, 333670, 355550, 433771, 834175, 867542, 1668350, 2168855, 4337710, 10844275, 21688550]

約数ペア:

[(1, 21688550), (2, 10844275), (5, 4337710), (10, 2168855), (13, 1668350), (25, 867542), (26, 834175), (50, 433771), (61, 355550), (65, 333670), (122, 177775), (130, 166835), (305, 71110), (325, 66734), (547, 39650), (610, 35555), (650, 33367), (793, 27350), (1094, 19825), (1525, 14222), (1586, 13675), (2735, 7930), (3050, 7111), (3965, 5470)]