31291120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{787}}^1$

素因数の和:878

約数の個数: 80

約数和(自身を含む): 84423168

約数和(自身を除く): 53132048

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 497, 560, 568, 710, 787, 994, 1136, 1420, 1574, 1988, 2485, 2840, 3148, 3935, 3976, 4970, 5509, 5680, 6296, 7870, 7952, 9940, 11018, 12592, 15740, 19880, 22036, 27545, 31480, 39760, 44072, 55090, 55877, 62960, 88144, 110180, 111754, 220360, 223508, 279385, 391139, 440720, 447016, 558770, 782278, 894032, 1117540, 1564556, 1955695, 2235080, 3129112, 3911390, 4470160, 6258224, 7822780, 15645560, 31291120]

約数ペア:

[(1, 31291120), (2, 15645560), (4, 7822780), (5, 6258224), (7, 4470160), (8, 3911390), (10, 3129112), (14, 2235080), (16, 1955695), (20, 1564556), (28, 1117540), (35, 894032), (40, 782278), (56, 558770), (70, 447016), (71, 440720), (80, 391139), (112, 279385), (140, 223508), (142, 220360), (280, 111754), (284, 110180), (355, 88144), (497, 62960), (560, 55877), (568, 55090), (710, 44072), (787, 39760), (994, 31480), (1136, 27545), (1420, 22036), (1574, 19880), (1988, 15740), (2485, 12592), (2840, 11018), (3148, 9940), (3935, 7952), (3976, 7870), (4970, 6296), (5509, 5680)]