20884990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{383}}^1$

素因数の和:457

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 25563650

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 41, 70, 82, 95, 133, 190, 205, 266, 287, 383, 410, 574, 665, 766, 779, 1330, 1435, 1558, 1915, 2681, 2870, 3830, 3895, 5362, 5453, 7277, 7790, 10906, 13405, 14554, 15703, 26810, 27265, 31406, 36385, 50939, 54530, 72770, 78515, 101878, 109921, 157030, 219842, 254695, 298357, 509390, 549605, 596714, 1099210, 1491785, 2088499, 2983570, 4176998, 10442495, 20884990]

約数ペア:

[(1, 20884990), (2, 10442495), (5, 4176998), (7, 2983570), (10, 2088499), (14, 1491785), (19, 1099210), (35, 596714), (38, 549605), (41, 509390), (70, 298357), (82, 254695), (95, 219842), (133, 157030), (190, 109921), (205, 101878), (266, 78515), (287, 72770), (383, 54530), (410, 50939), (574, 36385), (665, 31406), (766, 27265), (779, 26810), (1330, 15703), (1435, 14554), (1558, 13405), (1915, 10906), (2681, 7790), (2870, 7277), (3830, 5453), (3895, 5362)]