20806625

素因数分解:

$5^3\times 7^2\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:151

約数の個数: 48

約数和(自身を含む): 31299840

約数和(自身を除く): 10493215

約数列:

[1, 5, 7, 25, 35, 43, 49, 79, 125, 175, 215, 245, 301, 395, 553, 875, 1075, 1225, 1505, 1975, 2107, 2765, 3397, 3871, 5375, 6125, 7525, 9875, 10535, 13825, 16985, 19355, 23779, 37625, 52675, 69125, 84925, 96775, 118895, 166453, 263375, 424625, 483875, 594475, 832265, 2972375, 4161325, 20806625]

約数ペア:

[(1, 20806625), (5, 4161325), (7, 2972375), (25, 832265), (35, 594475), (43, 483875), (49, 424625), (79, 263375), (125, 166453), (175, 118895), (215, 96775), (245, 84925), (301, 69125), (395, 52675), (553, 37625), (875, 23779), (1075, 19355), (1225, 16985), (1505, 13825), (1975, 10535), (2107, 9875), (2765, 7525), (3397, 6125), (3871, 5375)]