18228020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{223}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 39664128

約数和(自身を除く): 21436108

約数列:

[1, 2, 4, 5, 10, 20, 61, 67, 122, 134, 223, 244, 268, 305, 335, 446, 610, 670, 892, 1115, 1220, 1340, 2230, 4087, 4460, 8174, 13603, 14941, 16348, 20435, 27206, 29882, 40870, 54412, 59764, 68015, 74705, 81740, 136030, 149410, 272060, 298820, 911401, 1822802, 3645604, 4557005, 9114010, 18228020]

約数ペア:

[(1, 18228020), (2, 9114010), (4, 4557005), (5, 3645604), (10, 1822802), (20, 911401), (61, 298820), (67, 272060), (122, 149410), (134, 136030), (223, 81740), (244, 74705), (268, 68015), (305, 59764), (335, 54412), (446, 40870), (610, 29882), (670, 27206), (892, 20435), (1115, 16348), (1220, 14941), (1340, 13603), (2230, 8174), (4087, 4460)]