20664700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{557}}^1$

素因数の和:631

約数の個数: 72

約数和(自身を含む): 52309152

約数和(自身を除く): 31644452

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 53, 70, 100, 106, 140, 175, 212, 265, 350, 371, 530, 557, 700, 742, 1060, 1114, 1325, 1484, 1855, 2228, 2650, 2785, 3710, 3899, 5300, 5570, 7420, 7798, 9275, 11140, 13925, 15596, 18550, 19495, 27850, 29521, 37100, 38990, 55700, 59042, 77980, 97475, 118084, 147605, 194950, 206647, 295210, 389900, 413294, 590420, 738025, 826588, 1033235, 1476050, 2066470, 2952100, 4132940, 5166175, 10332350, 20664700]

約数ペア:

[(1, 20664700), (2, 10332350), (4, 5166175), (5, 4132940), (7, 2952100), (10, 2066470), (14, 1476050), (20, 1033235), (25, 826588), (28, 738025), (35, 590420), (50, 413294), (53, 389900), (70, 295210), (100, 206647), (106, 194950), (140, 147605), (175, 118084), (212, 97475), (265, 77980), (350, 59042), (371, 55700), (530, 38990), (557, 37100), (700, 29521), (742, 27850), (1060, 19495), (1114, 18550), (1325, 15596), (1484, 13925), (1855, 11140), (2228, 9275), (2650, 7798), (2785, 7420), (3710, 5570), (3899, 5300)]