209514920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{2971}}^1$

素因数の和:3066

約数の個数: 64

約数和(自身を含む): 494303040

約数和(自身を除く): 284788120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 43, 82, 86, 164, 172, 205, 215, 328, 344, 410, 430, 820, 860, 1640, 1720, 1763, 2971, 3526, 5942, 7052, 8815, 11884, 14104, 14855, 17630, 23768, 29710, 35260, 59420, 70520, 118840, 121811, 127753, 243622, 255506, 487244, 511012, 609055, 638765, 974488, 1022024, 1218110, 1277530, 2436220, 2555060, 4872440, 5110120, 5237873, 10475746, 20951492, 26189365, 41902984, 52378730, 104757460, 209514920]

約数ペア:

[(1, 209514920), (2, 104757460), (4, 52378730), (5, 41902984), (8, 26189365), (10, 20951492), (20, 10475746), (40, 5237873), (41, 5110120), (43, 4872440), (82, 2555060), (86, 2436220), (164, 1277530), (172, 1218110), (205, 1022024), (215, 974488), (328, 638765), (344, 609055), (410, 511012), (430, 487244), (820, 255506), (860, 243622), (1640, 127753), (1720, 121811), (1763, 118840), (2971, 70520), (3526, 59420), (5942, 35260), (7052, 29710), (8815, 23768), (11884, 17630), (14104, 14855)]