391521320

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{315743}}^1$

素因数の和:315785

約数の個数: 32

約数和(自身を含む): 909342720

約数和(自身を除く): 517821400

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 315743, 631486, 1262972, 1578715, 2525944, 3157430, 6314860, 9788033, 12629720, 19576066, 39152132, 48940165, 78304264, 97880330, 195760660, 391521320]

約数ペア:

[(1, 391521320), (2, 195760660), (4, 97880330), (5, 78304264), (8, 48940165), (10, 39152132), (20, 19576066), (31, 12629720), (40, 9788033), (62, 6314860), (124, 3157430), (155, 2525944), (248, 1578715), (310, 1262972), (620, 631486), (1240, 315743)]