245712640

素因数分解:

$2^8\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1979}}^1$

素因数の和:2097

約数の個数: 72

約数和(自身を含む): 594926640

約数和(自身を除く): 349214000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 97, 128, 160, 194, 256, 320, 388, 485, 640, 776, 970, 1280, 1552, 1940, 1979, 3104, 3880, 3958, 6208, 7760, 7916, 9895, 12416, 15520, 15832, 19790, 24832, 31040, 31664, 39580, 62080, 63328, 79160, 124160, 126656, 158320, 191963, 253312, 316640, 383926, 506624, 633280, 767852, 959815, 1266560, 1535704, 1919630, 2533120, 3071408, 3839260, 6142816, 7678520, 12285632, 15357040, 24571264, 30714080, 49142528, 61428160, 122856320, 245712640]

約数ペア:

[(1, 245712640), (2, 122856320), (4, 61428160), (5, 49142528), (8, 30714080), (10, 24571264), (16, 15357040), (20, 12285632), (32, 7678520), (40, 6142816), (64, 3839260), (80, 3071408), (97, 2533120), (128, 1919630), (160, 1535704), (194, 1266560), (256, 959815), (320, 767852), (388, 633280), (485, 506624), (640, 383926), (776, 316640), (970, 253312), (1280, 191963), (1552, 158320), (1940, 126656), (1979, 124160), (3104, 79160), (3880, 63328), (3958, 62080), (6208, 39580), (7760, 31664), (7916, 31040), (9895, 24832), (12416, 19790), (15520, 15832)]