31288120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{12823}}^1$

素因数の和:12895

約数の個数: 32

約数和(自身を含む): 71557920

約数和(自身を除く): 40269800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 12823, 25646, 51292, 64115, 102584, 128230, 256460, 512920, 782203, 1564406, 3128812, 3911015, 6257624, 7822030, 15644060, 31288120]

約数ペア:

[(1, 31288120), (2, 15644060), (4, 7822030), (5, 6257624), (8, 3911015), (10, 3128812), (20, 1564406), (40, 782203), (61, 512920), (122, 256460), (244, 128230), (305, 102584), (488, 64115), (610, 51292), (1220, 25646), (2440, 12823)]