20862760

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{283}}^1$

素因数の和:410

約数の個数: 64

約数和(自身を含む): 50097600

約数和(自身を除く): 29234840

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 97, 152, 190, 194, 283, 380, 388, 485, 566, 760, 776, 970, 1132, 1415, 1843, 1940, 2264, 2830, 3686, 3880, 5377, 5660, 7372, 9215, 10754, 11320, 14744, 18430, 21508, 26885, 27451, 36860, 43016, 53770, 54902, 73720, 107540, 109804, 137255, 215080, 219608, 274510, 521569, 549020, 1043138, 1098040, 2086276, 2607845, 4172552, 5215690, 10431380, 20862760]

約数ペア:

[(1, 20862760), (2, 10431380), (4, 5215690), (5, 4172552), (8, 2607845), (10, 2086276), (19, 1098040), (20, 1043138), (38, 549020), (40, 521569), (76, 274510), (95, 219608), (97, 215080), (152, 137255), (190, 109804), (194, 107540), (283, 73720), (380, 54902), (388, 53770), (485, 43016), (566, 36860), (760, 27451), (776, 26885), (970, 21508), (1132, 18430), (1415, 14744), (1843, 11320), (1940, 10754), (2264, 9215), (2830, 7372), (3686, 5660), (3880, 5377)]