21726980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1619}}^1$

素因数の和:1700

約数の個数: 48

約数和(自身を含む): 50621760

約数和(自身を除く): 28894780

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1619, 2684, 3238, 3355, 6476, 6710, 8095, 13420, 16190, 17809, 32380, 35618, 71236, 89045, 98759, 178090, 197518, 356180, 395036, 493795, 987590, 1086349, 1975180, 2172698, 4345396, 5431745, 10863490, 21726980]

約数ペア:

[(1, 21726980), (2, 10863490), (4, 5431745), (5, 4345396), (10, 2172698), (11, 1975180), (20, 1086349), (22, 987590), (44, 493795), (55, 395036), (61, 356180), (110, 197518), (122, 178090), (220, 98759), (244, 89045), (305, 71236), (610, 35618), (671, 32380), (1220, 17809), (1342, 16190), (1619, 13420), (2684, 8095), (3238, 6710), (3355, 6476)]