21453020

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{313}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 47476800

約数和(自身を除く): 26023780

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 149, 230, 298, 313, 460, 596, 626, 745, 1252, 1490, 1565, 2980, 3130, 3427, 6260, 6854, 7199, 13708, 14398, 17135, 28796, 34270, 35995, 46637, 68540, 71990, 93274, 143980, 186548, 233185, 466370, 932740, 1072651, 2145302, 4290604, 5363255, 10726510, 21453020]

約数ペア:

[(1, 21453020), (2, 10726510), (4, 5363255), (5, 4290604), (10, 2145302), (20, 1072651), (23, 932740), (46, 466370), (92, 233185), (115, 186548), (149, 143980), (230, 93274), (298, 71990), (313, 68540), (460, 46637), (596, 35995), (626, 34270), (745, 28796), (1252, 17135), (1490, 14398), (1565, 13708), (2980, 7199), (3130, 6854), (3427, 6260)]