399377405

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1\times {\mathrm{2741}}^1$

素因数の和:2957

約数の個数: 32

約数和(自身を含む): 574898688

約数和(自身を除く): 175521283

約数列:

[1, 5, 7, 23, 35, 115, 161, 181, 805, 905, 1267, 2741, 4163, 6335, 13705, 19187, 20815, 29141, 63043, 95935, 145705, 315215, 441301, 496121, 2206505, 2480605, 3472847, 11410783, 17364235, 57053915, 79875481, 399377405]

約数ペア:

[(1, 399377405), (5, 79875481), (7, 57053915), (23, 17364235), (35, 11410783), (115, 3472847), (161, 2480605), (181, 2206505), (805, 496121), (905, 441301), (1267, 315215), (2741, 145705), (4163, 95935), (6335, 63043), (13705, 29141), (19187, 20815)]