20264815880

素因数分解:

$2^3\times 5^1\times {\mathrm{1637}}^1\times {\mathrm{309481}}^1$

素因数の和:311129

約数の個数: 32

約数和(自身を含む): 45623836440

約数和(自身を除く): 25359020560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1637, 3274, 6548, 8185, 13096, 16370, 32740, 65480, 309481, 618962, 1237924, 1547405, 2475848, 3094810, 6189620, 12379240, 506620397, 1013240794, 2026481588, 2533101985, 4052963176, 5066203970, 10132407940, 20264815880]

約数ペア:

[(1, 20264815880), (2, 10132407940), (4, 5066203970), (5, 4052963176), (8, 2533101985), (10, 2026481588), (20, 1013240794), (40, 506620397), (1637, 12379240), (3274, 6189620), (6548, 3094810), (8185, 2475848), (13096, 1547405), (16370, 1237924), (32740, 618962), (65480, 309481)]