389645840

素因数分解:

$2^4\times 5^1\times {\mathrm{281}}^1\times {\mathrm{17333}}^1$

素因数の和:17627

約数の個数: 40

約数和(自身を含む): 909202968

約数和(自身を除く): 519557128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 281, 562, 1124, 1405, 2248, 2810, 4496, 5620, 11240, 17333, 22480, 34666, 69332, 86665, 138664, 173330, 277328, 346660, 693320, 1386640, 4870573, 9741146, 19482292, 24352865, 38964584, 48705730, 77929168, 97411460, 194822920, 389645840]

約数ペア:

[(1, 389645840), (2, 194822920), (4, 97411460), (5, 77929168), (8, 48705730), (10, 38964584), (16, 24352865), (20, 19482292), (40, 9741146), (80, 4870573), (281, 1386640), (562, 693320), (1124, 346660), (1405, 277328), (2248, 173330), (2810, 138664), (4496, 86665), (5620, 69332), (11240, 34666), (17333, 22480)]