7878520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{139}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 19404000

約数和(自身を除く): 11525480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 109, 130, 139, 218, 260, 278, 436, 520, 545, 556, 695, 872, 1090, 1112, 1390, 1417, 1807, 2180, 2780, 2834, 3614, 4360, 5560, 5668, 7085, 7228, 9035, 11336, 14170, 14456, 15151, 18070, 28340, 30302, 36140, 56680, 60604, 72280, 75755, 121208, 151510, 196963, 303020, 393926, 606040, 787852, 984815, 1575704, 1969630, 3939260, 7878520]

約数ペア:

[(1, 7878520), (2, 3939260), (4, 1969630), (5, 1575704), (8, 984815), (10, 787852), (13, 606040), (20, 393926), (26, 303020), (40, 196963), (52, 151510), (65, 121208), (104, 75755), (109, 72280), (130, 60604), (139, 56680), (218, 36140), (260, 30302), (278, 28340), (436, 18070), (520, 15151), (545, 14456), (556, 14170), (695, 11336), (872, 9035), (1090, 7228), (1112, 7085), (1390, 5668), (1417, 5560), (1807, 4360), (2180, 3614), (2780, 2834)]