8991980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{499}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 20412000

約数和(自身を除く): 11420020

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 53, 68, 85, 106, 170, 212, 265, 340, 499, 530, 901, 998, 1060, 1802, 1996, 2495, 3604, 4505, 4990, 8483, 9010, 9980, 16966, 18020, 26447, 33932, 42415, 52894, 84830, 105788, 132235, 169660, 264470, 449599, 528940, 899198, 1798396, 2247995, 4495990, 8991980]

約数ペア:

[(1, 8991980), (2, 4495990), (4, 2247995), (5, 1798396), (10, 899198), (17, 528940), (20, 449599), (34, 264470), (53, 169660), (68, 132235), (85, 105788), (106, 84830), (170, 52894), (212, 42415), (265, 33932), (340, 26447), (499, 18020), (530, 16966), (901, 9980), (998, 9010), (1060, 8483), (1802, 4990), (1996, 4505), (2495, 3604)]