280406020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{229841}}^1$

素因数の和:229911

約数の個数: 24

約数和(自身を含む): 598508568

約数和(自身を除く): 318102548

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 229841, 459682, 919364, 1149205, 2298410, 4596820, 14020301, 28040602, 56081204, 70101505, 140203010, 280406020]

約数ペア:

[(1, 280406020), (2, 140203010), (4, 70101505), (5, 56081204), (10, 28040602), (20, 14020301), (61, 4596820), (122, 2298410), (244, 1149205), (305, 919364), (610, 459682), (1220, 229841)]