19718480

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7951}}^1$

素因数の和:7995

約数の個数: 40

約数和(自身を含む): 47330304

約数和(自身を除く): 27611824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 7951, 15902, 31804, 39755, 63608, 79510, 127216, 159020, 246481, 318040, 492962, 636080, 985924, 1232405, 1971848, 2464810, 3943696, 4929620, 9859240, 19718480]

約数ペア:

[(1, 19718480), (2, 9859240), (4, 4929620), (5, 3943696), (8, 2464810), (10, 1971848), (16, 1232405), (20, 985924), (31, 636080), (40, 492962), (62, 318040), (80, 246481), (124, 159020), (155, 127216), (248, 79510), (310, 63608), (496, 39755), (620, 31804), (1240, 15902), (2480, 7951)]