278418335

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:216

約数の個数: 64

約数和(自身を含む): 395974656

約数和(自身を除く): 117556321

約数列:

[1, 5, 13, 23, 43, 61, 65, 71, 115, 215, 299, 305, 355, 559, 793, 923, 989, 1403, 1495, 1633, 2623, 2795, 3053, 3965, 4331, 4615, 4945, 7015, 8165, 12857, 13115, 15265, 18239, 21229, 21655, 34099, 39689, 56303, 60329, 64285, 70219, 91195, 99613, 106145, 170495, 186233, 198445, 281515, 301645, 351095, 498065, 784277, 912847, 931165, 1294969, 2421029, 3921385, 4283359, 4564235, 6474845, 12105145, 21416795, 55683667, 278418335]

約数ペア:

[(1, 278418335), (5, 55683667), (13, 21416795), (23, 12105145), (43, 6474845), (61, 4564235), (65, 4283359), (71, 3921385), (115, 2421029), (215, 1294969), (299, 931165), (305, 912847), (355, 784277), (559, 498065), (793, 351095), (923, 301645), (989, 281515), (1403, 198445), (1495, 186233), (1633, 170495), (2623, 106145), (2795, 99613), (3053, 91195), (3965, 70219), (4331, 64285), (4615, 60329), (4945, 56303), (7015, 39689), (8165, 34099), (12857, 21655), (13115, 21229), (15265, 18239)]