90490180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{1721}}^1$

素因数の和:1980

約数の個数: 48

約数和(自身を含む): 208293120

約数和(自身を除く): 117802940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 239, 478, 956, 1195, 1721, 2390, 2629, 3442, 4780, 5258, 6884, 8605, 10516, 13145, 17210, 18931, 26290, 34420, 37862, 52580, 75724, 94655, 189310, 378620, 411319, 822638, 1645276, 2056595, 4113190, 4524509, 8226380, 9049018, 18098036, 22622545, 45245090, 90490180]

約数ペア:

[(1, 90490180), (2, 45245090), (4, 22622545), (5, 18098036), (10, 9049018), (11, 8226380), (20, 4524509), (22, 4113190), (44, 2056595), (55, 1645276), (110, 822638), (220, 411319), (239, 378620), (478, 189310), (956, 94655), (1195, 75724), (1721, 52580), (2390, 37862), (2629, 34420), (3442, 26290), (4780, 18931), (5258, 17210), (6884, 13145), (8605, 10516)]