21339890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{14923}}^1$

素因数の和:14954

約数の個数: 32

約数和(自身を含む): 45130176

約数和(自身を除く): 23790286

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 286, 715, 1430, 14923, 29846, 74615, 149230, 164153, 193999, 328306, 387998, 820765, 969995, 1641530, 1939990, 2133989, 4267978, 10669945, 21339890]

約数ペア:

[(1, 21339890), (2, 10669945), (5, 4267978), (10, 2133989), (11, 1939990), (13, 1641530), (22, 969995), (26, 820765), (55, 387998), (65, 328306), (110, 193999), (130, 164153), (143, 149230), (286, 74615), (715, 29846), (1430, 14923)]