161121620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{6719}}^1$

素因数の和:6848

約数の個数: 48

約数和(自身を含む): 372556800

約数和(自身を除く): 211435180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 218, 220, 436, 545, 1090, 1199, 2180, 2398, 4796, 5995, 6719, 11990, 13438, 23980, 26876, 33595, 67190, 73909, 134380, 147818, 295636, 369545, 732371, 739090, 1464742, 1478180, 2929484, 3661855, 7323710, 8056081, 14647420, 16112162, 32224324, 40280405, 80560810, 161121620]

約数ペア:

[(1, 161121620), (2, 80560810), (4, 40280405), (5, 32224324), (10, 16112162), (11, 14647420), (20, 8056081), (22, 7323710), (44, 3661855), (55, 2929484), (109, 1478180), (110, 1464742), (218, 739090), (220, 732371), (436, 369545), (545, 295636), (1090, 147818), (1199, 134380), (2180, 73909), (2398, 67190), (4796, 33595), (5995, 26876), (6719, 23980), (11990, 13438)]