21479940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{2539}}^1$

素因数の和:2601

約数の個数: 72

約数和(自身を含む): 66568320

約数和(自身を除く): 45088380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 47, 60, 90, 94, 141, 180, 188, 235, 282, 423, 470, 564, 705, 846, 940, 1410, 1692, 2115, 2539, 2820, 4230, 5078, 7617, 8460, 10156, 12695, 15234, 22851, 25390, 30468, 38085, 45702, 50780, 76170, 91404, 114255, 119333, 152340, 228510, 238666, 357999, 457020, 477332, 596665, 715998, 1073997, 1193330, 1431996, 1789995, 2147994, 2386660, 3579990, 4295988, 5369985, 7159980, 10739970, 21479940]

約数ペア:

[(1, 21479940), (2, 10739970), (3, 7159980), (4, 5369985), (5, 4295988), (6, 3579990), (9, 2386660), (10, 2147994), (12, 1789995), (15, 1431996), (18, 1193330), (20, 1073997), (30, 715998), (36, 596665), (45, 477332), (47, 457020), (60, 357999), (90, 238666), (94, 228510), (141, 152340), (180, 119333), (188, 114255), (235, 91404), (282, 76170), (423, 50780), (470, 45702), (564, 38085), (705, 30468), (846, 25390), (940, 22851), (1410, 15234), (1692, 12695), (2115, 10156), (2539, 8460), (2820, 7617), (4230, 5078)]