217870180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{197}}^1\times {\mathrm{457}}^1$

素因数の和:685

約数の個数: 72

約数和(自身を含む): 506560824

約数和(自身を除く): 288690644

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 197, 220, 242, 394, 457, 484, 605, 788, 914, 985, 1210, 1828, 1970, 2167, 2285, 2420, 3940, 4334, 4570, 5027, 8668, 9140, 10054, 10835, 20108, 21670, 23837, 25135, 43340, 47674, 50270, 55297, 90029, 95348, 100540, 110594, 119185, 180058, 221188, 238370, 276485, 360116, 450145, 476740, 552970, 900290, 990319, 1105940, 1800580, 1980638, 3961276, 4951595, 9903190, 10893509, 19806380, 21787018, 43574036, 54467545, 108935090, 217870180]

約数ペア:

[(1, 217870180), (2, 108935090), (4, 54467545), (5, 43574036), (10, 21787018), (11, 19806380), (20, 10893509), (22, 9903190), (44, 4951595), (55, 3961276), (110, 1980638), (121, 1800580), (197, 1105940), (220, 990319), (242, 900290), (394, 552970), (457, 476740), (484, 450145), (605, 360116), (788, 276485), (914, 238370), (985, 221188), (1210, 180058), (1828, 119185), (1970, 110594), (2167, 100540), (2285, 95348), (2420, 90029), (3940, 55297), (4334, 50270), (4570, 47674), (5027, 43340), (8668, 25135), (9140, 23837), (10054, 21670), (10835, 20108)]