398302580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{117841}}^1$

素因数の和:117876

約数の個数: 36

約数和(自身を含む): 905733612

約数和(自身を除く): 507431032

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 117841, 235682, 471364, 589205, 1178410, 1531933, 2356820, 3063866, 6127732, 7659665, 15319330, 19915129, 30638660, 39830258, 79660516, 99575645, 199151290, 398302580]

約数ペア:

[(1, 398302580), (2, 199151290), (4, 99575645), (5, 79660516), (10, 39830258), (13, 30638660), (20, 19915129), (26, 15319330), (52, 7659665), (65, 6127732), (130, 3063866), (169, 2356820), (260, 1531933), (338, 1178410), (676, 589205), (845, 471364), (1690, 235682), (3380, 117841)]