209901620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:301

約数の個数: 72

約数和(自身を含む): 465105312

約数和(自身を除く): 255203692

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 67, 124, 134, 155, 163, 268, 310, 326, 335, 620, 652, 670, 815, 961, 1340, 1630, 1922, 2077, 3260, 3844, 4154, 4805, 5053, 8308, 9610, 10106, 10385, 10921, 19220, 20212, 20770, 21842, 25265, 41540, 43684, 50530, 54605, 64387, 101060, 109210, 128774, 156643, 218420, 257548, 313286, 321935, 338551, 626572, 643870, 677102, 783215, 1287740, 1354204, 1566430, 1692755, 3132860, 3385510, 6771020, 10495081, 20990162, 41980324, 52475405, 104950810, 209901620]

約数ペア:

[(1, 209901620), (2, 104950810), (4, 52475405), (5, 41980324), (10, 20990162), (20, 10495081), (31, 6771020), (62, 3385510), (67, 3132860), (124, 1692755), (134, 1566430), (155, 1354204), (163, 1287740), (268, 783215), (310, 677102), (326, 643870), (335, 626572), (620, 338551), (652, 321935), (670, 313286), (815, 257548), (961, 218420), (1340, 156643), (1630, 128774), (1922, 109210), (2077, 101060), (3260, 64387), (3844, 54605), (4154, 50530), (4805, 43684), (5053, 41540), (8308, 25265), (9610, 21842), (10106, 20770), (10385, 20212), (10921, 19220)]