20347780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{887}}^1$

素因数の和:964

約数の個数: 48

約数和(自身を含む): 45351936

約数和(自身を除く): 25004156

約数列:

[1, 2, 4, 5, 10, 20, 31, 37, 62, 74, 124, 148, 155, 185, 310, 370, 620, 740, 887, 1147, 1774, 2294, 3548, 4435, 4588, 5735, 8870, 11470, 17740, 22940, 27497, 32819, 54994, 65638, 109988, 131276, 137485, 164095, 274970, 328190, 549940, 656380, 1017389, 2034778, 4069556, 5086945, 10173890, 20347780]

約数ペア:

[(1, 20347780), (2, 10173890), (4, 5086945), (5, 4069556), (10, 2034778), (20, 1017389), (31, 656380), (37, 549940), (62, 328190), (74, 274970), (124, 164095), (148, 137485), (155, 131276), (185, 109988), (310, 65638), (370, 54994), (620, 32819), (740, 27497), (887, 22940), (1147, 17740), (1774, 11470), (2294, 8870), (3548, 5735), (4435, 4588)]