400816

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:109

約数の個数: 40

約数和(自身を含む): 874944

約数和(自身を除く): 474128

約数列:

[1, 2, 4, 8, 13, 16, 26, 41, 47, 52, 82, 94, 104, 164, 188, 208, 328, 376, 533, 611, 656, 752, 1066, 1222, 1927, 2132, 2444, 3854, 4264, 4888, 7708, 8528, 9776, 15416, 25051, 30832, 50102, 100204, 200408, 400816]

約数ペア:

[(1, 400816), (2, 200408), (4, 100204), (8, 50102), (13, 30832), (16, 25051), (26, 15416), (41, 9776), (47, 8528), (52, 7708), (82, 4888), (94, 4264), (104, 3854), (164, 2444), (188, 2132), (208, 1927), (328, 1222), (376, 1066), (533, 752), (611, 656)]