78451990

素因数分解:

$2^1\times 5^1\times {\mathrm{641}}^1\times {\mathrm{12239}}^1$

素因数の和:12887

約数の個数: 16

約数和(自身を含む): 141445440

約数和(自身を除く): 62993450

約数列:

[1, 2, 5, 10, 641, 1282, 3205, 6410, 12239, 24478, 61195, 122390, 7845199, 15690398, 39225995, 78451990]

約数ペア:

[(1, 78451990), (2, 39225995), (5, 15690398), (10, 7845199), (641, 122390), (1282, 61195), (3205, 24478), (6410, 12239)]