39999400

素因数分解:

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

素因数の和:28594

約数の個数: 48

約数和(自身を含む): 106287840

約数和(自身を除く): 66288440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 140, 175, 200, 280, 350, 700, 1400, 28571, 57142, 114284, 142855, 199997, 228568, 285710, 399994, 571420, 714275, 799988, 999985, 1142840, 1428550, 1599976, 1999970, 2857100, 3999940, 4999925, 5714200, 7999880, 9999850, 19999700, 39999400]

約数ペア:

[(1, 39999400), (2, 19999700), (4, 9999850), (5, 7999880), (7, 5714200), (8, 4999925), (10, 3999940), (14, 2857100), (20, 1999970), (25, 1599976), (28, 1428550), (35, 1142840), (40, 999985), (50, 799988), (56, 714275), (70, 571420), (100, 399994), (140, 285710), (175, 228568), (200, 199997), (280, 142855), (350, 114284), (700, 57142), (1400, 28571)]