81785840

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4073}}^1$

素因数の和:4337

約数の個数: 40

約数和(自身を含む): 190956528

約数和(自身を除く): 109170688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1255, 2008, 2510, 4016, 4073, 5020, 8146, 10040, 16292, 20080, 20365, 32584, 40730, 65168, 81460, 162920, 325840, 1022323, 2044646, 4089292, 5111615, 8178584, 10223230, 16357168, 20446460, 40892920, 81785840]

約数ペア:

[(1, 81785840), (2, 40892920), (4, 20446460), (5, 16357168), (8, 10223230), (10, 8178584), (16, 5111615), (20, 4089292), (40, 2044646), (80, 1022323), (251, 325840), (502, 162920), (1004, 81460), (1255, 65168), (2008, 40730), (2510, 32584), (4016, 20365), (4073, 20080), (5020, 16292), (8146, 10040)]