20100128

素因数分解:

$2^5\times {\mathrm{79}}^1\times {\mathrm{7951}}^1$

素因数の和:8040

約数の個数: 24

約数和(自身を含む): 40078080

約数和(自身を除く): 19977952

約数列:

[1, 2, 4, 8, 16, 32, 79, 158, 316, 632, 1264, 2528, 7951, 15902, 31804, 63608, 127216, 254432, 628129, 1256258, 2512516, 5025032, 10050064, 20100128]

約数ペア:

[(1, 20100128), (2, 10050064), (4, 5025032), (8, 2512516), (16, 1256258), (32, 628129), (79, 254432), (158, 127216), (316, 63608), (632, 31804), (1264, 15902), (2528, 7951)]