20719980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2677}}^1$

素因数の和:2735

約数の個数: 72

約数和(自身を含む): 64336272

約数和(自身を除く): 43616292

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 2677, 3870, 5354, 7740, 8031, 10708, 13385, 16062, 24093, 26770, 32124, 40155, 48186, 53540, 80310, 96372, 115111, 120465, 160620, 230222, 240930, 345333, 460444, 481860, 575555, 690666, 1035999, 1151110, 1381332, 1726665, 2071998, 2302220, 3453330, 4143996, 5179995, 6906660, 10359990, 20719980]

約数ペア:

[(1, 20719980), (2, 10359990), (3, 6906660), (4, 5179995), (5, 4143996), (6, 3453330), (9, 2302220), (10, 2071998), (12, 1726665), (15, 1381332), (18, 1151110), (20, 1035999), (30, 690666), (36, 575555), (43, 481860), (45, 460444), (60, 345333), (86, 240930), (90, 230222), (129, 160620), (172, 120465), (180, 115111), (215, 96372), (258, 80310), (387, 53540), (430, 48186), (516, 40155), (645, 32124), (774, 26770), (860, 24093), (1290, 16062), (1548, 13385), (1935, 10708), (2580, 8031), (2677, 7740), (3870, 5354)]