21320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:65

約数の個数: 32

約数和(自身を含む): 52920

約数和(自身を除く): 31600

約数列:

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

約数ペア:

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