81807999

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:169

約数の個数: 72

約数和(自身を含む): 142696080

約数和(自身を除く): 60888081

約数列:

[1, 3, 7, 13, 21, 37, 39, 49, 89, 91, 111, 147, 169, 259, 267, 273, 481, 507, 623, 637, 777, 1157, 1183, 1443, 1813, 1869, 1911, 3293, 3367, 3471, 3549, 4361, 5439, 6253, 8099, 8281, 9879, 10101, 13083, 15041, 18759, 23051, 23569, 24297, 24843, 42809, 43771, 45123, 56693, 69153, 70707, 105287, 128427, 131313, 161357, 170079, 299663, 306397, 315861, 484071, 556517, 737009, 898989, 919191, 1669551, 2097641, 2211027, 3895619, 6292923, 11686857, 27269333, 81807999]

約数ペア:

[(1, 81807999), (3, 27269333), (7, 11686857), (13, 6292923), (21, 3895619), (37, 2211027), (39, 2097641), (49, 1669551), (89, 919191), (91, 898989), (111, 737009), (147, 556517), (169, 484071), (259, 315861), (267, 306397), (273, 299663), (481, 170079), (507, 161357), (623, 131313), (637, 128427), (777, 105287), (1157, 70707), (1183, 69153), (1443, 56693), (1813, 45123), (1869, 43771), (1911, 42809), (3293, 24843), (3367, 24297), (3471, 23569), (3549, 23051), (4361, 18759), (5439, 15041), (6253, 13083), (8099, 10101), (8281, 9879)]