81921140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{179}}^1\times {\mathrm{467}}^1$

素因数の和:669

約数の個数: 72

約数和(自身を含む): 201670560

約数和(自身を除く): 119749420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 179, 196, 245, 358, 467, 490, 716, 895, 934, 980, 1253, 1790, 1868, 2335, 2506, 3269, 3580, 4670, 5012, 6265, 6538, 8771, 9340, 12530, 13076, 16345, 17542, 22883, 25060, 32690, 35084, 43855, 45766, 65380, 83593, 87710, 91532, 114415, 167186, 175420, 228830, 334372, 417965, 457660, 585151, 835930, 1170302, 1671860, 2340604, 2925755, 4096057, 5851510, 8192114, 11703020, 16384228, 20480285, 40960570, 81921140]

約数ペア:

[(1, 81921140), (2, 40960570), (4, 20480285), (5, 16384228), (7, 11703020), (10, 8192114), (14, 5851510), (20, 4096057), (28, 2925755), (35, 2340604), (49, 1671860), (70, 1170302), (98, 835930), (140, 585151), (179, 457660), (196, 417965), (245, 334372), (358, 228830), (467, 175420), (490, 167186), (716, 114415), (895, 91532), (934, 87710), (980, 83593), (1253, 65380), (1790, 45766), (1868, 43855), (2335, 35084), (2506, 32690), (3269, 25060), (3580, 22883), (4670, 17542), (5012, 16345), (6265, 13076), (6538, 12530), (8771, 9340)]