21695120

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1951}}^1$

素因数の和:2103

約数の個数: 40

約数和(自身を含む): 50830080

約数和(自身を除く): 29134960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 1951, 2224, 2780, 3902, 5560, 7804, 9755, 11120, 15608, 19510, 31216, 39020, 78040, 156080, 271189, 542378, 1084756, 1355945, 2169512, 2711890, 4339024, 5423780, 10847560, 21695120]

約数ペア:

[(1, 21695120), (2, 10847560), (4, 5423780), (5, 4339024), (8, 2711890), (10, 2169512), (16, 1355945), (20, 1084756), (40, 542378), (80, 271189), (139, 156080), (278, 78040), (556, 39020), (695, 31216), (1112, 19510), (1390, 15608), (1951, 11120), (2224, 9755), (2780, 7804), (3902, 5560)]