21049945

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:445

約数の個数: 32

約数和(自身を含む): 30597120

約数和(自身を除く): 9547175

約数列:

[1, 5, 7, 23, 35, 79, 115, 161, 331, 395, 553, 805, 1655, 1817, 2317, 2765, 7613, 9085, 11585, 12719, 26149, 38065, 53291, 63595, 130745, 183043, 266455, 601427, 915215, 3007135, 4209989, 21049945]

約数ペア:

[(1, 21049945), (5, 4209989), (7, 3007135), (23, 915215), (35, 601427), (79, 266455), (115, 183043), (161, 130745), (331, 63595), (395, 53291), (553, 38065), (805, 26149), (1655, 12719), (1817, 11585), (2317, 9085), (2765, 7613)]