64740920

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{5171}}^1$

素因数の和:5495

約数の個数: 32

約数和(自身を含む): 146160720

約数和(自身を除く): 81419800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 2504, 3130, 5171, 6260, 10342, 12520, 20684, 25855, 41368, 51710, 103420, 206840, 1618523, 3237046, 6474092, 8092615, 12948184, 16185230, 32370460, 64740920]

約数ペア:

[(1, 64740920), (2, 32370460), (4, 16185230), (5, 12948184), (8, 8092615), (10, 6474092), (20, 3237046), (40, 1618523), (313, 206840), (626, 103420), (1252, 51710), (1565, 41368), (2504, 25855), (3130, 20684), (5171, 12520), (6260, 10342)]