261589840

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1\times {\mathrm{461}}^1$

素因数の和:688

約数の個数: 80

約数和(自身を含む): 627991056

約数和(自身を除く): 366401216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 173, 205, 328, 346, 410, 461, 656, 692, 820, 865, 922, 1384, 1640, 1730, 1844, 2305, 2768, 3280, 3460, 3688, 4610, 6920, 7093, 7376, 9220, 13840, 14186, 18440, 18901, 28372, 35465, 36880, 37802, 56744, 70930, 75604, 79753, 94505, 113488, 141860, 151208, 159506, 189010, 283720, 302416, 319012, 378020, 398765, 567440, 638024, 756040, 797530, 1276048, 1512080, 1595060, 3190120, 3269873, 6380240, 6539746, 13079492, 16349365, 26158984, 32698730, 52317968, 65397460, 130794920, 261589840]

約数ペア:

[(1, 261589840), (2, 130794920), (4, 65397460), (5, 52317968), (8, 32698730), (10, 26158984), (16, 16349365), (20, 13079492), (40, 6539746), (41, 6380240), (80, 3269873), (82, 3190120), (164, 1595060), (173, 1512080), (205, 1276048), (328, 797530), (346, 756040), (410, 638024), (461, 567440), (656, 398765), (692, 378020), (820, 319012), (865, 302416), (922, 283720), (1384, 189010), (1640, 159506), (1730, 151208), (1844, 141860), (2305, 113488), (2768, 94505), (3280, 79753), (3460, 75604), (3688, 70930), (4610, 56744), (6920, 37802), (7093, 36880), (7376, 35465), (9220, 28372), (13840, 18901), (14186, 18440)]