199956920

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{15971}}^1$

素因数の和:16295

約数の個数: 32

約数和(自身を含む): 451368720

約数和(自身を除く): 251411800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 2504, 3130, 6260, 12520, 15971, 31942, 63884, 79855, 127768, 159710, 319420, 638840, 4998923, 9997846, 19995692, 24994615, 39991384, 49989230, 99978460, 199956920]

約数ペア:

[(1, 199956920), (2, 99978460), (4, 49989230), (5, 39991384), (8, 24994615), (10, 19995692), (20, 9997846), (40, 4998923), (313, 638840), (626, 319420), (1252, 159710), (1565, 127768), (2504, 79855), (3130, 63884), (6260, 31942), (12520, 15971)]