18991020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1031}}^1$

素因数の和:1350

約数の個数: 48

約数和(自身を含む): 53399808

約数和(自身を除く): 34408788

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 307, 614, 921, 1031, 1228, 1535, 1842, 2062, 3070, 3093, 3684, 4124, 4605, 5155, 6140, 6186, 9210, 10310, 12372, 15465, 18420, 20620, 30930, 61860, 316517, 633034, 949551, 1266068, 1582585, 1899102, 3165170, 3798204, 4747755, 6330340, 9495510, 18991020]

約数ペア:

[(1, 18991020), (2, 9495510), (3, 6330340), (4, 4747755), (5, 3798204), (6, 3165170), (10, 1899102), (12, 1582585), (15, 1266068), (20, 949551), (30, 633034), (60, 316517), (307, 61860), (614, 30930), (921, 20620), (1031, 18420), (1228, 15465), (1535, 12372), (1842, 10310), (2062, 9210), (3070, 6186), (3093, 6140), (3684, 5155), (4124, 4605)]