21455875

素因数分解:

$5^3\times 7^2\times {\mathrm{31}}^1\times {\mathrm{113}}^1$

素因数の和:173

約数の個数: 48

約数和(自身を含む): 32438016

約数和(自身を除く): 10982141

約数列:

[1, 5, 7, 25, 31, 35, 49, 113, 125, 155, 175, 217, 245, 565, 775, 791, 875, 1085, 1225, 1519, 2825, 3503, 3875, 3955, 5425, 5537, 6125, 7595, 14125, 17515, 19775, 24521, 27125, 27685, 37975, 87575, 98875, 122605, 138425, 171647, 189875, 437875, 613025, 692125, 858235, 3065125, 4291175, 21455875]

約数ペア:

[(1, 21455875), (5, 4291175), (7, 3065125), (25, 858235), (31, 692125), (35, 613025), (49, 437875), (113, 189875), (125, 171647), (155, 138425), (175, 122605), (217, 98875), (245, 87575), (565, 37975), (775, 27685), (791, 27125), (875, 24521), (1085, 19775), (1225, 17515), (1519, 14125), (2825, 7595), (3503, 6125), (3875, 5537), (3955, 5425)]