20517350

素因数分解:

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

素因数の和:142

約数の個数: 72

約数和(自身を含む): 45805104

約数和(自身を除く): 25287754

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, 961, 1085, 1525, 1550, 1891, 1922, 2135, 2170, 3050, 3782, 4270, 4805, 5425, 6727, 9455, 9610, 10675, 10850, 13237, 13454, 18910, 21350, 24025, 26474, 33635, 47275, 48050, 58621, 66185, 67270, 94550, 117242, 132370, 168175, 293105, 330925, 336350, 410347, 586210, 661850, 820694, 1465525, 2051735, 2931050, 4103470, 10258675, 20517350]

約数ペア:

[(1, 20517350), (2, 10258675), (5, 4103470), (7, 2931050), (10, 2051735), (14, 1465525), (25, 820694), (31, 661850), (35, 586210), (50, 410347), (61, 336350), (62, 330925), (70, 293105), (122, 168175), (155, 132370), (175, 117242), (217, 94550), (305, 67270), (310, 66185), (350, 58621), (427, 48050), (434, 47275), (610, 33635), (775, 26474), (854, 24025), (961, 21350), (1085, 18910), (1525, 13454), (1550, 13237), (1891, 10850), (1922, 10675), (2135, 9610), (2170, 9455), (3050, 6727), (3782, 5425), (4270, 4805)]