21811664

素因数分解:

$2^4\times 7^2\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:712

約数の個数: 60

約数和(自身を含む): 50380704

約数和(自身を除く): 28569040

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 43, 49, 56, 86, 98, 112, 172, 196, 301, 344, 392, 602, 647, 688, 784, 1204, 1294, 2107, 2408, 2588, 4214, 4529, 4816, 5176, 8428, 9058, 10352, 16856, 18116, 27821, 31703, 33712, 36232, 55642, 63406, 72464, 111284, 126812, 194747, 222568, 253624, 389494, 445136, 507248, 778988, 1363229, 1557976, 2726458, 3115952, 5452916, 10905832, 21811664]

約数ペア:

[(1, 21811664), (2, 10905832), (4, 5452916), (7, 3115952), (8, 2726458), (14, 1557976), (16, 1363229), (28, 778988), (43, 507248), (49, 445136), (56, 389494), (86, 253624), (98, 222568), (112, 194747), (172, 126812), (196, 111284), (301, 72464), (344, 63406), (392, 55642), (602, 36232), (647, 33712), (688, 31703), (784, 27821), (1204, 18116), (1294, 16856), (2107, 10352), (2408, 9058), (2588, 8428), (4214, 5176), (4529, 4816)]