400404488

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{6781}}^1$

素因数の和:6870

約数の個数: 48

約数和(自身を含む): 838865580

約数和(自身を除く): 438461092

約数列:

[1, 2, 4, 8, 11, 22, 44, 61, 88, 121, 122, 242, 244, 484, 488, 671, 968, 1342, 2684, 5368, 6781, 7381, 13562, 14762, 27124, 29524, 54248, 59048, 74591, 149182, 298364, 413641, 596728, 820501, 827282, 1641002, 1654564, 3282004, 3309128, 4550051, 6564008, 9100102, 18200204, 36400408, 50050561, 100101122, 200202244, 400404488]

約数ペア:

[(1, 400404488), (2, 200202244), (4, 100101122), (8, 50050561), (11, 36400408), (22, 18200204), (44, 9100102), (61, 6564008), (88, 4550051), (121, 3309128), (122, 3282004), (242, 1654564), (244, 1641002), (484, 827282), (488, 820501), (671, 596728), (968, 413641), (1342, 298364), (2684, 149182), (5368, 74591), (6781, 59048), (7381, 54248), (13562, 29524), (14762, 27124)]