1640940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{3907}}^1$

素因数の和:3926

約数の個数: 48

約数和(自身を含む): 5252352

約数和(自身を除く): 3611412

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, 3907, 7814, 11721, 15628, 19535, 23442, 27349, 39070, 46884, 54698, 58605, 78140, 82047, 109396, 117210, 136745, 164094, 234420, 273490, 328188, 410235, 546980, 820470, 1640940]

約数ペア:

[(1, 1640940), (2, 820470), (3, 546980), (4, 410235), (5, 328188), (6, 273490), (7, 234420), (10, 164094), (12, 136745), (14, 117210), (15, 109396), (20, 82047), (21, 78140), (28, 58605), (30, 54698), (35, 46884), (42, 39070), (60, 27349), (70, 23442), (84, 19535), (105, 15628), (140, 11721), (210, 7814), (420, 3907)]