7999880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{28571}}^1$

素因数の和:28589

約数の個数: 32

約数和(自身を含む): 20571840

約数和(自身を除く): 12571960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 28571, 57142, 114284, 142855, 199997, 228568, 285710, 399994, 571420, 799988, 999985, 1142840, 1599976, 1999970, 3999940, 7999880]

約数ペア:

[(1, 7999880), (2, 3999940), (4, 1999970), (5, 1599976), (7, 1142840), (8, 999985), (10, 799988), (14, 571420), (20, 399994), (28, 285710), (35, 228568), (40, 199997), (56, 142855), (70, 114284), (140, 57142), (280, 28571)]