20901472420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{386921}}^1$

素因数の和:387040

約数の個数: 48

約数和(自身を含む): 45697035888

約数和(自身を除く): 24795563468

約数列:

[1, 2, 4, 5, 10, 20, 37, 73, 74, 146, 148, 185, 292, 365, 370, 730, 740, 1460, 2701, 5402, 10804, 13505, 27010, 54020, 386921, 773842, 1547684, 1934605, 3869210, 7738420, 14316077, 28245233, 28632154, 56490466, 57264308, 71580385, 112980932, 141226165, 143160770, 282452330, 286321540, 564904660, 1045073621, 2090147242, 4180294484, 5225368105, 10450736210, 20901472420]

約数ペア:

[(1, 20901472420), (2, 10450736210), (4, 5225368105), (5, 4180294484), (10, 2090147242), (20, 1045073621), (37, 564904660), (73, 286321540), (74, 282452330), (146, 143160770), (148, 141226165), (185, 112980932), (292, 71580385), (365, 57264308), (370, 56490466), (730, 28632154), (740, 28245233), (1460, 14316077), (2701, 7738420), (5402, 3869210), (10804, 1934605), (13505, 1547684), (27010, 773842), (54020, 386921)]