21000559472

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{240347}}^1$

素因数の和:240525

約数の個数: 40

約数和(自身を含む): 41962838016

約数和(自身を除く): 20962278544

約数列:

[1, 2, 4, 8, 16, 43, 86, 127, 172, 254, 344, 508, 688, 1016, 2032, 5461, 10922, 21844, 43688, 87376, 240347, 480694, 961388, 1922776, 3845552, 10334921, 20669842, 30524069, 41339684, 61048138, 82679368, 122096276, 165358736, 244192552, 488385104, 1312534967, 2625069934, 5250139868, 10500279736, 21000559472]

約数ペア:

[(1, 21000559472), (2, 10500279736), (4, 5250139868), (8, 2625069934), (16, 1312534967), (43, 488385104), (86, 244192552), (127, 165358736), (172, 122096276), (254, 82679368), (344, 61048138), (508, 41339684), (688, 30524069), (1016, 20669842), (2032, 10334921), (5461, 3845552), (10922, 1922776), (21844, 961388), (43688, 480694), (87376, 240347)]