20255580

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2617}}^1$

素因数の和:2675

約数の個数: 72

約数和(自身を含む): 62894832

約数和(自身を除く): 42639252

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, 2617, 3870, 5234, 7740, 7851, 10468, 13085, 15702, 23553, 26170, 31404, 39255, 47106, 52340, 78510, 94212, 112531, 117765, 157020, 225062, 235530, 337593, 450124, 471060, 562655, 675186, 1012779, 1125310, 1350372, 1687965, 2025558, 2250620, 3375930, 4051116, 5063895, 6751860, 10127790, 20255580]

約数ペア:

[(1, 20255580), (2, 10127790), (3, 6751860), (4, 5063895), (5, 4051116), (6, 3375930), (9, 2250620), (10, 2025558), (12, 1687965), (15, 1350372), (18, 1125310), (20, 1012779), (30, 675186), (36, 562655), (43, 471060), (45, 450124), (60, 337593), (86, 235530), (90, 225062), (129, 157020), (172, 117765), (180, 112531), (215, 94212), (258, 78510), (387, 52340), (430, 47106), (516, 39255), (645, 31404), (774, 26170), (860, 23553), (1290, 15702), (1548, 13085), (1935, 10468), (2580, 7851), (2617, 7740), (3870, 5234)]