123381560

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{12289}}^1$

素因数の和:12551

約数の個数: 32

約数和(自身を含む): 278737200

約数和(自身を除く): 155355640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2510, 5020, 10040, 12289, 24578, 49156, 61445, 98312, 122890, 245780, 491560, 3084539, 6169078, 12338156, 15422695, 24676312, 30845390, 61690780, 123381560]

約数ペア:

[(1, 123381560), (2, 61690780), (4, 30845390), (5, 24676312), (8, 15422695), (10, 12338156), (20, 6169078), (40, 3084539), (251, 491560), (502, 245780), (1004, 122890), (1255, 98312), (2008, 61445), (2510, 49156), (5020, 24578), (10040, 12289)]