19965790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{383}}^1\times {\mathrm{401}}^1$

素因数の和:804

約数の個数: 32

約数和(自身を含む): 38900736

約数和(自身を除く): 18934946

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 383, 401, 766, 802, 1915, 2005, 3830, 4010, 4979, 5213, 9958, 10426, 24895, 26065, 49790, 52130, 153583, 307166, 767915, 1535830, 1996579, 3993158, 9982895, 19965790]

約数ペア:

[(1, 19965790), (2, 9982895), (5, 3993158), (10, 1996579), (13, 1535830), (26, 767915), (65, 307166), (130, 153583), (383, 52130), (401, 49790), (766, 26065), (802, 24895), (1915, 10426), (2005, 9958), (3830, 5213), (4010, 4979)]