18897680

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4457}}^1$

素因数の和:4523

約数の個数: 40

約数和(自身を含む): 44776152

約数和(自身を除く): 25878472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4457, 8914, 17828, 22285, 35656, 44570, 71312, 89140, 178280, 236221, 356560, 472442, 944884, 1181105, 1889768, 2362210, 3779536, 4724420, 9448840, 18897680]

約数ペア:

[(1, 18897680), (2, 9448840), (4, 4724420), (5, 3779536), (8, 2362210), (10, 1889768), (16, 1181105), (20, 944884), (40, 472442), (53, 356560), (80, 236221), (106, 178280), (212, 89140), (265, 71312), (424, 44570), (530, 35656), (848, 22285), (1060, 17828), (2120, 8914), (4240, 4457)]