81329080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4091}}^1$

素因数の和:4180

約数の個数: 64

約数和(自身を含む): 212129280

約数和(自身を除く): 130800200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1988, 2485, 2840, 3976, 4091, 4970, 8182, 9940, 16364, 19880, 20455, 28637, 32728, 40910, 57274, 81820, 114548, 143185, 163640, 229096, 286370, 290461, 572740, 580922, 1145480, 1161844, 1452305, 2033227, 2323688, 2904610, 4066454, 5809220, 8132908, 10166135, 11618440, 16265816, 20332270, 40664540, 81329080]

約数ペア:

[(1, 81329080), (2, 40664540), (4, 20332270), (5, 16265816), (7, 11618440), (8, 10166135), (10, 8132908), (14, 5809220), (20, 4066454), (28, 2904610), (35, 2323688), (40, 2033227), (56, 1452305), (70, 1161844), (71, 1145480), (140, 580922), (142, 572740), (280, 290461), (284, 286370), (355, 229096), (497, 163640), (568, 143185), (710, 114548), (994, 81820), (1420, 57274), (1988, 40910), (2485, 32728), (2840, 28637), (3976, 20455), (4091, 19880), (4970, 16364), (8182, 9940)]