639660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{1523}}^1$

素因数の和:1542

約数の個数: 48

約数和(自身を含む): 2048256

約数和(自身を除く): 1408596

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, 1523, 3046, 4569, 6092, 7615, 9138, 10661, 15230, 18276, 21322, 22845, 30460, 31983, 42644, 45690, 53305, 63966, 91380, 106610, 127932, 159915, 213220, 319830, 639660]

約数ペア:

[(1, 639660), (2, 319830), (3, 213220), (4, 159915), (5, 127932), (6, 106610), (7, 91380), (10, 63966), (12, 53305), (14, 45690), (15, 42644), (20, 31983), (21, 30460), (28, 22845), (30, 21322), (35, 18276), (42, 15230), (60, 10661), (70, 9138), (84, 7615), (105, 6092), (140, 4569), (210, 3046), (420, 1523)]