31881880

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{2963}}^1$

素因数の和:3243

約数の個数: 32

約数和(自身を含む): 72025200

約数和(自身を除く): 40143320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 2152, 2690, 2963, 5380, 5926, 10760, 11852, 14815, 23704, 29630, 59260, 118520, 797047, 1594094, 3188188, 3985235, 6376376, 7970470, 15940940, 31881880]

約数ペア:

[(1, 31881880), (2, 15940940), (4, 7970470), (5, 6376376), (8, 3985235), (10, 3188188), (20, 1594094), (40, 797047), (269, 118520), (538, 59260), (1076, 29630), (1345, 23704), (2152, 14815), (2690, 11852), (2963, 10760), (5380, 5926)]