81121480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{331}}^1\times {\mathrm{557}}^1$

素因数の和:910

約数の個数: 64

約数和(自身を含む): 200076480

約数和(自身を除く): 118955000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 331, 440, 557, 662, 1114, 1324, 1655, 2228, 2648, 2785, 3310, 3641, 4456, 5570, 6127, 6620, 7282, 11140, 12254, 13240, 14564, 18205, 22280, 24508, 29128, 30635, 36410, 49016, 61270, 72820, 122540, 145640, 184367, 245080, 368734, 737468, 921835, 1474936, 1843670, 2028037, 3687340, 4056074, 7374680, 8112148, 10140185, 16224296, 20280370, 40560740, 81121480]

約数ペア:

[(1, 81121480), (2, 40560740), (4, 20280370), (5, 16224296), (8, 10140185), (10, 8112148), (11, 7374680), (20, 4056074), (22, 3687340), (40, 2028037), (44, 1843670), (55, 1474936), (88, 921835), (110, 737468), (220, 368734), (331, 245080), (440, 184367), (557, 145640), (662, 122540), (1114, 72820), (1324, 61270), (1655, 49016), (2228, 36410), (2648, 30635), (2785, 29128), (3310, 24508), (3641, 22280), (4456, 18205), (5570, 14564), (6127, 13240), (6620, 12254), (7282, 11140)]