20865440

素因数分解:

$2^5\times 5^1\times {\mathrm{130409}}^1$

素因数の和:130424

約数の個数: 24

約数和(自身を含む): 49294980

約数和(自身を除く): 28429540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 130409, 260818, 521636, 652045, 1043272, 1304090, 2086544, 2608180, 4173088, 5216360, 10432720, 20865440]

約数ペア:

[(1, 20865440), (2, 10432720), (4, 5216360), (5, 4173088), (8, 2608180), (10, 2086544), (16, 1304090), (20, 1043272), (32, 652045), (40, 521636), (80, 260818), (160, 130409)]