661850

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:111

約数の個数: 48

約数和(自身を含む): 1476096

約数和(自身を除く): 814246

約数列:

[1, 2, 5, 7, 10, 14, 25, 31, 35, 50, 61, 62, 70, 122, 155, 175, 217, 305, 310, 350, 427, 434, 610, 775, 854, 1085, 1525, 1550, 1891, 2135, 2170, 3050, 3782, 4270, 5425, 9455, 10675, 10850, 13237, 18910, 21350, 26474, 47275, 66185, 94550, 132370, 330925, 661850]

約数ペア:

[(1, 661850), (2, 330925), (5, 132370), (7, 94550), (10, 66185), (14, 47275), (25, 26474), (31, 21350), (35, 18910), (50, 13237), (61, 10850), (62, 10675), (70, 9455), (122, 5425), (155, 4270), (175, 3782), (217, 3050), (305, 2170), (310, 2135), (350, 1891), (427, 1550), (434, 1525), (610, 1085), (775, 854)]