20915028

素因数分解:

$2^2\times 3^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{229}}^1$

素因数の和:341

約数の個数: 72

約数和(自身を含む): 55255200

約数和(自身を除く): 34340172

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 43, 59, 86, 118, 129, 172, 177, 229, 236, 258, 354, 387, 458, 516, 531, 687, 708, 774, 916, 1062, 1374, 1548, 2061, 2124, 2537, 2748, 4122, 5074, 7611, 8244, 9847, 10148, 13511, 15222, 19694, 22833, 27022, 29541, 30444, 39388, 40533, 45666, 54044, 59082, 81066, 88623, 91332, 118164, 121599, 162132, 177246, 243198, 354492, 486396, 580973, 1161946, 1742919, 2323892, 3485838, 5228757, 6971676, 10457514, 20915028]

約数ペア:

[(1, 20915028), (2, 10457514), (3, 6971676), (4, 5228757), (6, 3485838), (9, 2323892), (12, 1742919), (18, 1161946), (36, 580973), (43, 486396), (59, 354492), (86, 243198), (118, 177246), (129, 162132), (172, 121599), (177, 118164), (229, 91332), (236, 88623), (258, 81066), (354, 59082), (387, 54044), (458, 45666), (516, 40533), (531, 39388), (687, 30444), (708, 29541), (774, 27022), (916, 22833), (1062, 19694), (1374, 15222), (1548, 13511), (2061, 10148), (2124, 9847), (2537, 8244), (2748, 7611), (4122, 5074)]