407820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{971}}^1$

素因数の和:990

約数の個数: 48

約数和(自身を含む): 1306368

約数和(自身を除く): 898548

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, 971, 1942, 2913, 3884, 4855, 5826, 6797, 9710, 11652, 13594, 14565, 19420, 20391, 27188, 29130, 33985, 40782, 58260, 67970, 81564, 101955, 135940, 203910, 407820]

約数ペア:

[(1, 407820), (2, 203910), (3, 135940), (4, 101955), (5, 81564), (6, 67970), (7, 58260), (10, 40782), (12, 33985), (14, 29130), (15, 27188), (20, 20391), (21, 19420), (28, 14565), (30, 13594), (35, 11652), (42, 9710), (60, 6797), (70, 5826), (84, 4855), (105, 3884), (140, 2913), (210, 1942), (420, 971)]