21904840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{32213}}^1$

素因数の和:32241

約数の個数: 32

約数和(自身を含む): 52186680

約数和(自身を除く): 30281840

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 32213, 64426, 128852, 161065, 257704, 322130, 547621, 644260, 1095242, 1288520, 2190484, 2738105, 4380968, 5476210, 10952420, 21904840]

約数ペア:

[(1, 21904840), (2, 10952420), (4, 5476210), (5, 4380968), (8, 2738105), (10, 2190484), (17, 1288520), (20, 1095242), (34, 644260), (40, 547621), (68, 322130), (85, 257704), (136, 161065), (170, 128852), (340, 64426), (680, 32213)]