204540

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{487}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 655872

約数和(自身を除く): 451332

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, 487, 974, 1461, 1948, 2435, 2922, 3409, 4870, 5844, 6818, 7305, 9740, 10227, 13636, 14610, 17045, 20454, 29220, 34090, 40908, 51135, 68180, 102270, 204540]

約数ペア:

[(1, 204540), (2, 102270), (3, 68180), (4, 51135), (5, 40908), (6, 34090), (7, 29220), (10, 20454), (12, 17045), (14, 14610), (15, 13636), (20, 10227), (21, 9740), (28, 7305), (30, 6818), (35, 5844), (42, 4870), (60, 3409), (70, 2922), (84, 2435), (105, 1948), (140, 1461), (210, 974), (420, 487)]