289455980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{21569}}^1$

素因数の和:21650

約数の個数: 48

約数和(自身を含む): 674019360

約数和(自身を除く): 384563380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 2684, 3355, 6710, 13420, 21569, 43138, 86276, 107845, 215690, 237259, 431380, 474518, 949036, 1186295, 1315709, 2372590, 2631418, 4745180, 5262836, 6578545, 13157090, 14472799, 26314180, 28945598, 57891196, 72363995, 144727990, 289455980]

約数ペア:

[(1, 289455980), (2, 144727990), (4, 72363995), (5, 57891196), (10, 28945598), (11, 26314180), (20, 14472799), (22, 13157090), (44, 6578545), (55, 5262836), (61, 4745180), (110, 2631418), (122, 2372590), (220, 1315709), (244, 1186295), (305, 949036), (610, 474518), (671, 431380), (1220, 237259), (1342, 215690), (2684, 107845), (3355, 86276), (6710, 43138), (13420, 21569)]