64639880

素因数分解:

$2^3\times 5^1\times {\mathrm{1123}}^1\times {\mathrm{1439}}^1$

素因数の和:2573

約数の個数: 32

約数和(自身を含む): 145670400

約数和(自身を除く): 81030520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1123, 1439, 2246, 2878, 4492, 5615, 5756, 7195, 8984, 11230, 11512, 14390, 22460, 28780, 44920, 57560, 1615997, 3231994, 6463988, 8079985, 12927976, 16159970, 32319940, 64639880]

約数ペア:

[(1, 64639880), (2, 32319940), (4, 16159970), (5, 12927976), (8, 8079985), (10, 6463988), (20, 3231994), (40, 1615997), (1123, 57560), (1439, 44920), (2246, 28780), (2878, 22460), (4492, 14390), (5615, 11512), (5756, 11230), (7195, 8984)]