21249655

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{269}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 30533760

約数和(自身を除く): 9284105

約数列:

[1, 5, 7, 35, 37, 61, 185, 259, 269, 305, 427, 1295, 1345, 1883, 2135, 2257, 9415, 9953, 11285, 15799, 16409, 49765, 69671, 78995, 82045, 114863, 348355, 574315, 607133, 3035665, 4249931, 21249655]

約数ペア:

[(1, 21249655), (5, 4249931), (7, 3035665), (35, 607133), (37, 574315), (61, 348355), (185, 114863), (259, 82045), (269, 78995), (305, 69671), (427, 49765), (1295, 16409), (1345, 15799), (1883, 11285), (2135, 9953), (2257, 9415)]