81902275

素因数分解:

$5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 131606160

約数和(自身を除く): 49703885

約数列:

[1, 5, 7, 13, 25, 35, 37, 49, 65, 91, 139, 175, 185, 245, 259, 325, 455, 481, 637, 695, 925, 973, 1225, 1295, 1807, 1813, 2275, 2405, 3185, 3367, 3475, 4865, 5143, 6475, 6811, 9035, 9065, 12025, 12649, 15925, 16835, 23569, 24325, 25715, 34055, 36001, 45175, 45325, 63245, 66859, 84175, 88543, 117845, 128575, 170275, 180005, 252007, 316225, 334295, 442715, 468013, 589225, 900025, 1260035, 1671475, 2213575, 2340065, 3276091, 6300175, 11700325, 16380455, 81902275]

約数ペア:

[(1, 81902275), (5, 16380455), (7, 11700325), (13, 6300175), (25, 3276091), (35, 2340065), (37, 2213575), (49, 1671475), (65, 1260035), (91, 900025), (139, 589225), (175, 468013), (185, 442715), (245, 334295), (259, 316225), (325, 252007), (455, 180005), (481, 170275), (637, 128575), (695, 117845), (925, 88543), (973, 84175), (1225, 66859), (1295, 63245), (1807, 45325), (1813, 45175), (2275, 36001), (2405, 34055), (3185, 25715), (3367, 24325), (3475, 23569), (4865, 16835), (5143, 15925), (6475, 12649), (6811, 12025), (9035, 9065)]