81347720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{227}}^1$

素因数の和:303

約数の個数: 96

約数和(自身を含む): 201588480

約数和(自身を除く): 120240760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 62, 68, 85, 124, 136, 155, 170, 227, 248, 289, 310, 340, 454, 527, 578, 620, 680, 908, 1054, 1135, 1156, 1240, 1445, 1816, 2108, 2270, 2312, 2635, 2890, 3859, 4216, 4540, 5270, 5780, 7037, 7718, 8959, 9080, 10540, 11560, 14074, 15436, 17918, 19295, 21080, 28148, 30872, 35185, 35836, 38590, 44795, 56296, 65603, 70370, 71672, 77180, 89590, 119629, 131206, 140740, 154360, 179180, 239258, 262412, 281480, 328015, 358360, 478516, 524824, 598145, 656030, 957032, 1196290, 1312060, 2033693, 2392580, 2624120, 4067386, 4785160, 8134772, 10168465, 16269544, 20336930, 40673860, 81347720]

約数ペア:

[(1, 81347720), (2, 40673860), (4, 20336930), (5, 16269544), (8, 10168465), (10, 8134772), (17, 4785160), (20, 4067386), (31, 2624120), (34, 2392580), (40, 2033693), (62, 1312060), (68, 1196290), (85, 957032), (124, 656030), (136, 598145), (155, 524824), (170, 478516), (227, 358360), (248, 328015), (289, 281480), (310, 262412), (340, 239258), (454, 179180), (527, 154360), (578, 140740), (620, 131206), (680, 119629), (908, 89590), (1054, 77180), (1135, 71672), (1156, 70370), (1240, 65603), (1445, 56296), (1816, 44795), (2108, 38590), (2270, 35836), (2312, 35185), (2635, 30872), (2890, 28148), (3859, 21080), (4216, 19295), (4540, 17918), (5270, 15436), (5780, 14074), (7037, 11560), (7718, 10540), (8959, 9080)]