81406740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{227}}^1$

素因数の和:421

約数の個数: 96

約数和(自身を含む): 235952640

約数和(自身を除く): 154545900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 86, 129, 139, 172, 215, 227, 258, 278, 417, 430, 454, 516, 556, 645, 681, 695, 834, 860, 908, 1135, 1290, 1362, 1390, 1668, 2085, 2270, 2580, 2724, 2780, 3405, 4170, 4540, 5977, 6810, 8340, 9761, 11954, 13620, 17931, 19522, 23908, 29283, 29885, 31553, 35862, 39044, 48805, 58566, 59770, 63106, 71724, 89655, 94659, 97610, 117132, 119540, 126212, 146415, 157765, 179310, 189318, 195220, 292830, 315530, 358620, 378636, 473295, 585660, 631060, 946590, 1356779, 1893180, 2713558, 4070337, 5427116, 6783895, 8140674, 13567790, 16281348, 20351685, 27135580, 40703370, 81406740]

約数ペア:

[(1, 81406740), (2, 40703370), (3, 27135580), (4, 20351685), (5, 16281348), (6, 13567790), (10, 8140674), (12, 6783895), (15, 5427116), (20, 4070337), (30, 2713558), (43, 1893180), (60, 1356779), (86, 946590), (129, 631060), (139, 585660), (172, 473295), (215, 378636), (227, 358620), (258, 315530), (278, 292830), (417, 195220), (430, 189318), (454, 179310), (516, 157765), (556, 146415), (645, 126212), (681, 119540), (695, 117132), (834, 97610), (860, 94659), (908, 89655), (1135, 71724), (1290, 63106), (1362, 59770), (1390, 58566), (1668, 48805), (2085, 39044), (2270, 35862), (2580, 31553), (2724, 29885), (2780, 29283), (3405, 23908), (4170, 19522), (4540, 17931), (5977, 13620), (6810, 11954), (8340, 9761)]