27981980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{383}}^1$

素因数の和:686

約数の個数: 48

約数和(自身を含む): 63673344

約数和(自身を除く): 35691364

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 281, 383, 562, 766, 1124, 1405, 1532, 1915, 2810, 3653, 3830, 4979, 5620, 7306, 7660, 9958, 14612, 18265, 19916, 24895, 36530, 49790, 73060, 99580, 107623, 215246, 430492, 538115, 1076230, 1399099, 2152460, 2798198, 5596396, 6995495, 13990990, 27981980]

約数ペア:

[(1, 27981980), (2, 13990990), (4, 6995495), (5, 5596396), (10, 2798198), (13, 2152460), (20, 1399099), (26, 1076230), (52, 538115), (65, 430492), (130, 215246), (260, 107623), (281, 99580), (383, 73060), (562, 49790), (766, 36530), (1124, 24895), (1405, 19916), (1532, 18265), (1915, 14612), (2810, 9958), (3653, 7660), (3830, 7306), (4979, 5620)]