20183920

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1607}}^1$

素因数の和:1777

約数の個数: 40

約数和(自身を含む): 47255904

約数和(自身を除く): 27071984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1607, 2512, 3140, 3214, 6280, 6428, 8035, 12560, 12856, 16070, 25712, 32140, 64280, 128560, 252299, 504598, 1009196, 1261495, 2018392, 2522990, 4036784, 5045980, 10091960, 20183920]

約数ペア:

[(1, 20183920), (2, 10091960), (4, 5045980), (5, 4036784), (8, 2522990), (10, 2018392), (16, 1261495), (20, 1009196), (40, 504598), (80, 252299), (157, 128560), (314, 64280), (628, 32140), (785, 25712), (1256, 16070), (1570, 12856), (1607, 12560), (2512, 8035), (3140, 6428), (3214, 6280)]