20885265

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1187}}^1$

素因数の和:1238

約数の個数: 48

約数和(自身を含む): 40030848

約数和(自身を除く): 19145583

約数列:

[1, 3, 5, 9, 15, 17, 23, 45, 51, 69, 85, 115, 153, 207, 255, 345, 391, 765, 1035, 1173, 1187, 1955, 3519, 3561, 5865, 5935, 10683, 17595, 17805, 20179, 27301, 53415, 60537, 81903, 100895, 136505, 181611, 245709, 302685, 409515, 464117, 908055, 1228545, 1392351, 2320585, 4177053, 6961755, 20885265]

約数ペア:

[(1, 20885265), (3, 6961755), (5, 4177053), (9, 2320585), (15, 1392351), (17, 1228545), (23, 908055), (45, 464117), (51, 409515), (69, 302685), (85, 245709), (115, 181611), (153, 136505), (207, 100895), (255, 81903), (345, 60537), (391, 53415), (765, 27301), (1035, 20179), (1173, 17805), (1187, 17595), (1955, 10683), (3519, 5935), (3561, 5865)]