18221320

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{523}}^1$

素因数の和:614

約数の個数: 64

約数和(自身を含む): 44896320

約数和(自身を除く): 26675000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 67, 104, 130, 134, 260, 268, 335, 520, 523, 536, 670, 871, 1046, 1340, 1742, 2092, 2615, 2680, 3484, 4184, 4355, 5230, 6799, 6968, 8710, 10460, 13598, 17420, 20920, 27196, 33995, 34840, 35041, 54392, 67990, 70082, 135980, 140164, 175205, 271960, 280328, 350410, 455533, 700820, 911066, 1401640, 1822132, 2277665, 3644264, 4555330, 9110660, 18221320]

約数ペア:

[(1, 18221320), (2, 9110660), (4, 4555330), (5, 3644264), (8, 2277665), (10, 1822132), (13, 1401640), (20, 911066), (26, 700820), (40, 455533), (52, 350410), (65, 280328), (67, 271960), (104, 175205), (130, 140164), (134, 135980), (260, 70082), (268, 67990), (335, 54392), (520, 35041), (523, 34840), (536, 33995), (670, 27196), (871, 20920), (1046, 17420), (1340, 13598), (1742, 10460), (2092, 8710), (2615, 6968), (2680, 6799), (3484, 5230), (4184, 4355)]