21357245

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{643}}^1$

素因数の和:741

約数の個数: 32

約数和(自身を含む): 32024832

約数和(自身を除く): 10667587

約数列:

[1, 5, 7, 13, 35, 65, 73, 91, 365, 455, 511, 643, 949, 2555, 3215, 4501, 4745, 6643, 8359, 22505, 33215, 41795, 46939, 58513, 234695, 292565, 328573, 610207, 1642865, 3051035, 4271449, 21357245]

約数ペア:

[(1, 21357245), (5, 4271449), (7, 3051035), (13, 1642865), (35, 610207), (65, 328573), (73, 292565), (91, 234695), (365, 58513), (455, 46939), (511, 41795), (643, 33215), (949, 22505), (2555, 8359), (3215, 6643), (4501, 4745)]