217845980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{90019}}^1$

素因数の和:90050

約数の個数: 36

約数和(自身を含む): 502851720

約数和(自身を除く): 285005740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 90019, 180038, 360076, 450095, 900190, 990209, 1800380, 1980418, 3960836, 4951045, 9902090, 10892299, 19804180, 21784598, 43569196, 54461495, 108922990, 217845980]

約数ペア:

[(1, 217845980), (2, 108922990), (4, 54461495), (5, 43569196), (10, 21784598), (11, 19804180), (20, 10892299), (22, 9902090), (44, 4951045), (55, 3960836), (110, 1980418), (121, 1800380), (220, 990209), (242, 900190), (484, 450095), (605, 360076), (1210, 180038), (2420, 90019)]