20864690

素因数分解:

$2^1\times 5^1\times 7^4\times {\mathrm{11}}^1\times {\mathrm{79}}^1$

素因数の和:125

約数の個数: 80

約数和(自身を含む): 48401280

約数和(自身を除く): 27536590

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 79, 98, 110, 154, 158, 245, 343, 385, 395, 490, 539, 553, 686, 770, 790, 869, 1078, 1106, 1715, 1738, 2401, 2695, 2765, 3430, 3773, 3871, 4345, 4802, 5390, 5530, 6083, 7546, 7742, 8690, 12005, 12166, 18865, 19355, 24010, 26411, 27097, 30415, 37730, 38710, 42581, 52822, 54194, 60830, 85162, 132055, 135485, 189679, 212905, 264110, 270970, 298067, 379358, 425810, 596134, 948395, 1490335, 1896790, 2086469, 2980670, 4172938, 10432345, 20864690]

約数ペア:

[(1, 20864690), (2, 10432345), (5, 4172938), (7, 2980670), (10, 2086469), (11, 1896790), (14, 1490335), (22, 948395), (35, 596134), (49, 425810), (55, 379358), (70, 298067), (77, 270970), (79, 264110), (98, 212905), (110, 189679), (154, 135485), (158, 132055), (245, 85162), (343, 60830), (385, 54194), (395, 52822), (490, 42581), (539, 38710), (553, 37730), (686, 30415), (770, 27097), (790, 26411), (869, 24010), (1078, 19355), (1106, 18865), (1715, 12166), (1738, 12005), (2401, 8690), (2695, 7742), (2765, 7546), (3430, 6083), (3773, 5530), (3871, 5390), (4345, 4802)]