20644515

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{227}}^1$

素因数の和:328

約数の個数: 48

約数和(自身を含む): 37559808

約数和(自身を除く): 16915293

約数列:

[1, 3, 5, 9, 15, 43, 45, 47, 129, 141, 215, 227, 235, 387, 423, 645, 681, 705, 1135, 1935, 2021, 2043, 2115, 3405, 6063, 9761, 10105, 10215, 10669, 18189, 29283, 30315, 32007, 48805, 53345, 87849, 90945, 96021, 146415, 160035, 439245, 458767, 480105, 1376301, 2293835, 4128903, 6881505, 20644515]

約数ペア:

[(1, 20644515), (3, 6881505), (5, 4128903), (9, 2293835), (15, 1376301), (43, 480105), (45, 458767), (47, 439245), (129, 160035), (141, 146415), (215, 96021), (227, 90945), (235, 87849), (387, 53345), (423, 48805), (645, 32007), (681, 30315), (705, 29283), (1135, 18189), (1935, 10669), (2021, 10215), (2043, 10105), (2115, 9761), (3405, 6063)]