20856672

素因数分解:

$2^5\times 3^2\times {\mathrm{139}}^1\times {\mathrm{521}}^1$

素因数の和:676

約数の個数: 72

約数和(自身を含む): 59852520

約数和(自身を除く): 38995848

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 139, 144, 278, 288, 417, 521, 556, 834, 1042, 1112, 1251, 1563, 1668, 2084, 2224, 2502, 3126, 3336, 4168, 4448, 4689, 5004, 6252, 6672, 8336, 9378, 10008, 12504, 13344, 16672, 18756, 20016, 25008, 37512, 40032, 50016, 72419, 75024, 144838, 150048, 217257, 289676, 434514, 579352, 651771, 869028, 1158704, 1303542, 1738056, 2317408, 2607084, 3476112, 5214168, 6952224, 10428336, 20856672]

約数ペア:

[(1, 20856672), (2, 10428336), (3, 6952224), (4, 5214168), (6, 3476112), (8, 2607084), (9, 2317408), (12, 1738056), (16, 1303542), (18, 1158704), (24, 869028), (32, 651771), (36, 579352), (48, 434514), (72, 289676), (96, 217257), (139, 150048), (144, 144838), (278, 75024), (288, 72419), (417, 50016), (521, 40032), (556, 37512), (834, 25008), (1042, 20016), (1112, 18756), (1251, 16672), (1563, 13344), (1668, 12504), (2084, 10008), (2224, 9378), (2502, 8336), (3126, 6672), (3336, 6252), (4168, 5004), (4448, 4689)]