20919640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74713}}^1$

素因数の和:74731

約数の個数: 32

約数和(自身を含む): 53794080

約数和(自身を除く): 32874440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74713, 149426, 298852, 373565, 522991, 597704, 747130, 1045982, 1494260, 2091964, 2614955, 2988520, 4183928, 5229910, 10459820, 20919640]

約数ペア:

[(1, 20919640), (2, 10459820), (4, 5229910), (5, 4183928), (7, 2988520), (8, 2614955), (10, 2091964), (14, 1494260), (20, 1045982), (28, 747130), (35, 597704), (40, 522991), (56, 373565), (70, 298852), (140, 149426), (280, 74713)]