21436880

素因数分解:

$2^4\times 5^1\times {\mathrm{267961}}^1$

素因数の和:267974

約数の個数: 20

約数和(自身を含む): 49840932

約数和(自身を除く): 28404052

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267961, 535922, 1071844, 1339805, 2143688, 2679610, 4287376, 5359220, 10718440, 21436880]

約数ペア:

[(1, 21436880), (2, 10718440), (4, 5359220), (5, 4287376), (8, 2679610), (10, 2143688), (16, 1339805), (20, 1071844), (40, 535922), (80, 267961)]