216221420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{136849}}^1$

素因数の和:136937

約数の個数: 24

約数和(自身を含む): 459816000

約数和(自身を除く): 243594580

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 136849, 273698, 547396, 684245, 1368490, 2736980, 10811071, 21622142, 43244284, 54055355, 108110710, 216221420]

約数ペア:

[(1, 216221420), (2, 108110710), (4, 54055355), (5, 43244284), (10, 21622142), (20, 10811071), (79, 2736980), (158, 1368490), (316, 684245), (395, 547396), (790, 273698), (1580, 136849)]