21776560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20939}}^1$

素因数の和:20965

約数の個数: 40

約数和(自身を含む): 54527760

約数和(自身を除く): 32751200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20939, 41878, 83756, 104695, 167512, 209390, 272207, 335024, 418780, 544414, 837560, 1088828, 1361035, 1675120, 2177656, 2722070, 4355312, 5444140, 10888280, 21776560]

約数ペア:

[(1, 21776560), (2, 10888280), (4, 5444140), (5, 4355312), (8, 2722070), (10, 2177656), (13, 1675120), (16, 1361035), (20, 1088828), (26, 837560), (40, 544414), (52, 418780), (65, 335024), (80, 272207), (104, 209390), (130, 167512), (208, 104695), (260, 83756), (520, 41878), (1040, 20939)]