21991750

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^2\times {\mathrm{727}}^1$

素因数の和:766

約数の個数: 48

約数和(自身を含む): 45313632

約数和(自身を除く): 23321882

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 121, 125, 242, 250, 275, 550, 605, 727, 1210, 1375, 1454, 2750, 3025, 3635, 6050, 7270, 7997, 15125, 15994, 18175, 30250, 36350, 39985, 79970, 87967, 90875, 175934, 181750, 199925, 399850, 439835, 879670, 999625, 1999250, 2199175, 4398350, 10995875, 21991750]

約数ペア:

[(1, 21991750), (2, 10995875), (5, 4398350), (10, 2199175), (11, 1999250), (22, 999625), (25, 879670), (50, 439835), (55, 399850), (110, 199925), (121, 181750), (125, 175934), (242, 90875), (250, 87967), (275, 79970), (550, 39985), (605, 36350), (727, 30250), (1210, 18175), (1375, 15994), (1454, 15125), (2750, 7997), (3025, 7270), (3635, 6050)]