42640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:67

約数の個数: 40

約数和(自身を含む): 109368

約数和(自身を除く): 66728

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 520, 533, 656, 820, 1040, 1066, 1640, 2132, 2665, 3280, 4264, 5330, 8528, 10660, 21320, 42640]

約数ペア:

[(1, 42640), (2, 21320), (4, 10660), (5, 8528), (8, 5330), (10, 4264), (13, 3280), (16, 2665), (20, 2132), (26, 1640), (40, 1066), (41, 1040), (52, 820), (65, 656), (80, 533), (82, 520), (104, 410), (130, 328), (164, 260), (205, 208)]