21435440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20611}}^1$

素因数の和:20637

約数の個数: 40

約数和(自身を含む): 53673648

約数和(自身を除く): 32238208

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20611, 41222, 82444, 103055, 164888, 206110, 267943, 329776, 412220, 535886, 824440, 1071772, 1339715, 1648880, 2143544, 2679430, 4287088, 5358860, 10717720, 21435440]

約数ペア:

[(1, 21435440), (2, 10717720), (4, 5358860), (5, 4287088), (8, 2679430), (10, 2143544), (13, 1648880), (16, 1339715), (20, 1071772), (26, 824440), (40, 535886), (52, 412220), (65, 329776), (80, 267943), (104, 206110), (130, 164888), (208, 103055), (260, 82444), (520, 41222), (1040, 20611)]