21395185

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{197}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 30792960

約数和(自身を除く): 9397775

約数列:

[1, 5, 7, 29, 35, 107, 145, 197, 203, 535, 749, 985, 1015, 1379, 3103, 3745, 5713, 6895, 15515, 21079, 21721, 28565, 39991, 105395, 108605, 147553, 199955, 611291, 737765, 3056455, 4279037, 21395185]

約数ペア:

[(1, 21395185), (5, 4279037), (7, 3056455), (29, 737765), (35, 611291), (107, 199955), (145, 147553), (197, 108605), (203, 105395), (535, 39991), (749, 28565), (985, 21721), (1015, 21079), (1379, 15515), (3103, 6895), (3745, 5713)]