21638372

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 45308928

約数和(自身を除く): 23670556

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 97, 124, 194, 217, 257, 388, 434, 514, 679, 868, 1028, 1358, 1799, 2716, 3007, 3598, 6014, 7196, 7967, 12028, 15934, 21049, 24929, 31868, 42098, 49858, 55769, 84196, 99716, 111538, 174503, 223076, 349006, 698012, 772799, 1545598, 3091196, 5409593, 10819186, 21638372]

約数ペア:

[(1, 21638372), (2, 10819186), (4, 5409593), (7, 3091196), (14, 1545598), (28, 772799), (31, 698012), (62, 349006), (97, 223076), (124, 174503), (194, 111538), (217, 99716), (257, 84196), (388, 55769), (434, 49858), (514, 42098), (679, 31868), (868, 24929), (1028, 21049), (1358, 15934), (1799, 12028), (2716, 7967), (3007, 7196), (3598, 6014)]