20178487760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8136487}}^1$

素因数の和:8136531

約数の個数: 40

約数和(自身を含む): 48428376576

約数和(自身を除く): 28249888816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8136487, 16272974, 32545948, 40682435, 65091896, 81364870, 130183792, 162729740, 252231097, 325459480, 504462194, 650918960, 1008924388, 1261155485, 2017848776, 2522310970, 4035697552, 5044621940, 10089243880, 20178487760]

約数ペア:

[(1, 20178487760), (2, 10089243880), (4, 5044621940), (5, 4035697552), (8, 2522310970), (10, 2017848776), (16, 1261155485), (20, 1008924388), (31, 650918960), (40, 504462194), (62, 325459480), (80, 252231097), (124, 162729740), (155, 130183792), (248, 81364870), (310, 65091896), (496, 40682435), (620, 32545948), (1240, 16272974), (2480, 8136487)]