18980680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15307}}^1$

素因数の和:15349

約数の個数: 32

約数和(自身を含む): 44087040

約数和(自身を除く): 25106360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 15307, 30614, 61228, 76535, 122456, 153070, 306140, 474517, 612280, 949034, 1898068, 2372585, 3796136, 4745170, 9490340, 18980680]

約数ペア:

[(1, 18980680), (2, 9490340), (4, 4745170), (5, 3796136), (8, 2372585), (10, 1898068), (20, 949034), (31, 612280), (40, 474517), (62, 306140), (124, 153070), (155, 122456), (248, 76535), (310, 61228), (620, 30614), (1240, 15307)]