21797960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17579}}^1$

素因数の和:17621

約数の個数: 32

約数和(自身を含む): 50630400

約数和(自身を除く): 28832440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17579, 35158, 70316, 87895, 140632, 175790, 351580, 544949, 703160, 1089898, 2179796, 2724745, 4359592, 5449490, 10898980, 21797960]

約数ペア:

[(1, 21797960), (2, 10898980), (4, 5449490), (5, 4359592), (8, 2724745), (10, 2179796), (20, 1089898), (31, 703160), (40, 544949), (62, 351580), (124, 175790), (155, 140632), (248, 87895), (310, 70316), (620, 35158), (1240, 17579)]