21487980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{677}}^1$

素因数の和:735

約数の個数: 72

約数和(自身を含む): 62988912

約数和(自身を除く): 41500932

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 529, 677, 690, 1058, 1354, 1380, 1587, 2031, 2116, 2645, 2708, 3174, 3385, 4062, 5290, 6348, 6770, 7935, 8124, 10155, 10580, 13540, 15571, 15870, 20310, 31142, 31740, 40620, 46713, 62284, 77855, 93426, 155710, 186852, 233565, 311420, 358133, 467130, 716266, 934260, 1074399, 1432532, 1790665, 2148798, 3581330, 4297596, 5371995, 7162660, 10743990, 21487980]

約数ペア:

[(1, 21487980), (2, 10743990), (3, 7162660), (4, 5371995), (5, 4297596), (6, 3581330), (10, 2148798), (12, 1790665), (15, 1432532), (20, 1074399), (23, 934260), (30, 716266), (46, 467130), (60, 358133), (69, 311420), (92, 233565), (115, 186852), (138, 155710), (230, 93426), (276, 77855), (345, 62284), (460, 46713), (529, 40620), (677, 31740), (690, 31142), (1058, 20310), (1354, 15870), (1380, 15571), (1587, 13540), (2031, 10580), (2116, 10155), (2645, 8124), (2708, 7935), (3174, 6770), (3385, 6348), (4062, 5290)]