20978630

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^2\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:165

約数の個数: 48

約数和(自身を含む): 40752720

約数和(自身を除く): 19774090

約数列:

[1, 2, 5, 10, 31, 37, 59, 62, 74, 118, 155, 185, 295, 310, 370, 590, 961, 1147, 1829, 1922, 2183, 2294, 3658, 4366, 4805, 5735, 9145, 9610, 10915, 11470, 18290, 21830, 35557, 56699, 67673, 71114, 113398, 135346, 177785, 283495, 338365, 355570, 566990, 676730, 2097863, 4195726, 10489315, 20978630]

約数ペア:

[(1, 20978630), (2, 10489315), (5, 4195726), (10, 2097863), (31, 676730), (37, 566990), (59, 355570), (62, 338365), (74, 283495), (118, 177785), (155, 135346), (185, 113398), (295, 71114), (310, 67673), (370, 56699), (590, 35557), (961, 21830), (1147, 18290), (1829, 11470), (1922, 10915), (2183, 9610), (2294, 9145), (3658, 5735), (4366, 4805)]