19810180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{5861}}^1$

素因数の和:5896

約数の個数: 36

約数和(自身を含む): 45055332

約数和(自身を除く): 25245152

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 5861, 11722, 23444, 29305, 58610, 76193, 117220, 152386, 304772, 380965, 761930, 990509, 1523860, 1981018, 3962036, 4952545, 9905090, 19810180]

約数ペア:

[(1, 19810180), (2, 9905090), (4, 4952545), (5, 3962036), (10, 1981018), (13, 1523860), (20, 990509), (26, 761930), (52, 380965), (65, 304772), (130, 152386), (169, 117220), (260, 76193), (338, 58610), (676, 29305), (845, 23444), (1690, 11722), (3380, 5861)]