21523140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1097}}^1$

素因数の和:1221

約数の個数: 72

約数和(自身を含む): 65945880

約数和(自身を除く): 44422740

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 109, 180, 218, 327, 436, 545, 654, 981, 1090, 1097, 1308, 1635, 1962, 2180, 2194, 3270, 3291, 3924, 4388, 4905, 5485, 6540, 6582, 9810, 9873, 10970, 13164, 16455, 19620, 19746, 21940, 32910, 39492, 49365, 65820, 98730, 119573, 197460, 239146, 358719, 478292, 597865, 717438, 1076157, 1195730, 1434876, 1793595, 2152314, 2391460, 3587190, 4304628, 5380785, 7174380, 10761570, 21523140]

約数ペア:

[(1, 21523140), (2, 10761570), (3, 7174380), (4, 5380785), (5, 4304628), (6, 3587190), (9, 2391460), (10, 2152314), (12, 1793595), (15, 1434876), (18, 1195730), (20, 1076157), (30, 717438), (36, 597865), (45, 478292), (60, 358719), (90, 239146), (109, 197460), (180, 119573), (218, 98730), (327, 65820), (436, 49365), (545, 39492), (654, 32910), (981, 21940), (1090, 19746), (1097, 19620), (1308, 16455), (1635, 13164), (1962, 10970), (2180, 9873), (2194, 9810), (3270, 6582), (3291, 6540), (3924, 5485), (4388, 4905)]