399297856

素因数分解:

$2^6\times {\mathrm{31}}^1\times {\mathrm{313}}^1\times {\mathrm{643}}^1$

素因数の和:999

約数の個数: 56

約数和(自身を含む): 821805824

約数和(自身を除く): 422507968

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 248, 313, 496, 626, 643, 992, 1252, 1286, 1984, 2504, 2572, 5008, 5144, 9703, 10016, 10288, 19406, 19933, 20032, 20576, 38812, 39866, 41152, 77624, 79732, 155248, 159464, 201259, 310496, 318928, 402518, 620992, 637856, 805036, 1275712, 1610072, 3220144, 6239029, 6440288, 12478058, 12880576, 24956116, 49912232, 99824464, 199648928, 399297856]

約数ペア:

[(1, 399297856), (2, 199648928), (4, 99824464), (8, 49912232), (16, 24956116), (31, 12880576), (32, 12478058), (62, 6440288), (64, 6239029), (124, 3220144), (248, 1610072), (313, 1275712), (496, 805036), (626, 637856), (643, 620992), (992, 402518), (1252, 318928), (1286, 310496), (1984, 201259), (2504, 159464), (2572, 155248), (5008, 79732), (5144, 77624), (9703, 41152), (10016, 39866), (10288, 38812), (19406, 20576), (19933, 20032)]