20580280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2371}}^1$

素因数の和:2420

約数の個数: 64

約数和(自身を含む): 54650880

約数和(自身を除く): 34070600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2371, 4340, 4742, 8680, 9484, 11855, 16597, 18968, 23710, 33194, 47420, 66388, 73501, 82985, 94840, 132776, 147002, 165970, 294004, 331940, 367505, 514507, 588008, 663880, 735010, 1029014, 1470020, 2058028, 2572535, 2940040, 4116056, 5145070, 10290140, 20580280]

約数ペア:

[(1, 20580280), (2, 10290140), (4, 5145070), (5, 4116056), (7, 2940040), (8, 2572535), (10, 2058028), (14, 1470020), (20, 1029014), (28, 735010), (31, 663880), (35, 588008), (40, 514507), (56, 367505), (62, 331940), (70, 294004), (124, 165970), (140, 147002), (155, 132776), (217, 94840), (248, 82985), (280, 73501), (310, 66388), (434, 47420), (620, 33194), (868, 23710), (1085, 18968), (1240, 16597), (1736, 11855), (2170, 9484), (2371, 8680), (4340, 4742)]