20178391088

素因数分解:

$2^4\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{101681}}^1$

素因数の和:101925

約数の個数: 40

約数和(自身を含む): 39843074880

約数和(自身を除く): 19664683792

約数列:

[1, 2, 4, 8, 16, 79, 157, 158, 314, 316, 628, 632, 1256, 1264, 2512, 12403, 24806, 49612, 99224, 101681, 198448, 203362, 406724, 813448, 1626896, 8032799, 15963917, 16065598, 31927834, 32131196, 63855668, 64262392, 127711336, 128524784, 255422672, 1261149443, 2522298886, 5044597772, 10089195544, 20178391088]

約数ペア:

[(1, 20178391088), (2, 10089195544), (4, 5044597772), (8, 2522298886), (16, 1261149443), (79, 255422672), (157, 128524784), (158, 127711336), (314, 64262392), (316, 63855668), (628, 32131196), (632, 31927834), (1256, 16065598), (1264, 15963917), (2512, 8032799), (12403, 1626896), (24806, 813448), (49612, 406724), (99224, 203362), (101681, 198448)]