20797380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2687}}^1$

素因数の和:2745

約数の個数: 72

約数和(自身を含む): 64576512

約数和(自身を除く): 43779132

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, 2687, 3870, 5374, 7740, 8061, 10748, 13435, 16122, 24183, 26870, 32244, 40305, 48366, 53740, 80610, 96732, 115541, 120915, 161220, 231082, 241830, 346623, 462164, 483660, 577705, 693246, 1039869, 1155410, 1386492, 1733115, 2079738, 2310820, 3466230, 4159476, 5199345, 6932460, 10398690, 20797380]

約数ペア:

[(1, 20797380), (2, 10398690), (3, 6932460), (4, 5199345), (5, 4159476), (6, 3466230), (9, 2310820), (10, 2079738), (12, 1733115), (15, 1386492), (18, 1155410), (20, 1039869), (30, 693246), (36, 577705), (43, 483660), (45, 462164), (60, 346623), (86, 241830), (90, 231082), (129, 161220), (172, 120915), (180, 115541), (215, 96732), (258, 80610), (387, 53740), (430, 48366), (516, 40305), (645, 32244), (774, 26870), (860, 24183), (1290, 16122), (1548, 13435), (1935, 10748), (2580, 8061), (2687, 7740), (3870, 5374)]