21153340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81359}}^1$

素因数の和:81381

約数の個数: 24

約数和(自身を含む): 47839680

約数和(自身を除く): 26686340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81359, 162718, 325436, 406795, 813590, 1057667, 1627180, 2115334, 4230668, 5288335, 10576670, 21153340]

約数ペア:

[(1, 21153340), (2, 10576670), (4, 5288335), (5, 4230668), (10, 2115334), (13, 1627180), (20, 1057667), (26, 813590), (52, 406795), (65, 325436), (130, 162718), (260, 81359)]