138275920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{90971}}^1$

素因数の和:91003

約数の個数: 40

約数和(自身を含む): 338415840

約数和(自身を除く): 200139920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 90971, 181942, 363884, 454855, 727768, 909710, 1455536, 1728449, 1819420, 3456898, 3638840, 6913796, 7277680, 8642245, 13827592, 17284490, 27655184, 34568980, 69137960, 138275920]

約数ペア:

[(1, 138275920), (2, 69137960), (4, 34568980), (5, 27655184), (8, 17284490), (10, 13827592), (16, 8642245), (19, 7277680), (20, 6913796), (38, 3638840), (40, 3456898), (76, 1819420), (80, 1728449), (95, 1455536), (152, 909710), (190, 727768), (304, 454855), (380, 363884), (760, 181942), (1520, 90971)]