1388940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{3307}}^1$

素因数の和:3326

約数の個数: 48

約数和(自身を含む): 4445952

約数和(自身を除く): 3057012

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 3307, 6614, 9921, 13228, 16535, 19842, 23149, 33070, 39684, 46298, 49605, 66140, 69447, 92596, 99210, 115745, 138894, 198420, 231490, 277788, 347235, 462980, 694470, 1388940]

約数ペア:

[(1, 1388940), (2, 694470), (3, 462980), (4, 347235), (5, 277788), (6, 231490), (7, 198420), (10, 138894), (12, 115745), (14, 99210), (15, 92596), (20, 69447), (21, 66140), (28, 49605), (30, 46298), (35, 39684), (42, 33070), (60, 23149), (70, 19842), (84, 16535), (105, 13228), (140, 9921), (210, 6614), (420, 3307)]