280028

素因数分解:

$2^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:221

約数の個数: 24

約数和(自身を含む): 571872

約数和(自身を除く): 291844

約数列:

[1, 2, 4, 7, 14, 28, 73, 137, 146, 274, 292, 511, 548, 959, 1022, 1918, 2044, 3836, 10001, 20002, 40004, 70007, 140014, 280028]

約数ペア:

[(1, 280028), (2, 140014), (4, 70007), (7, 40004), (14, 20002), (28, 10001), (73, 3836), (137, 2044), (146, 1918), (274, 1022), (292, 959), (511, 548)]