19958708

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 45224256

約数和(自身を除く): 25265548

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 43, 44, 77, 86, 121, 137, 154, 172, 242, 274, 301, 308, 473, 484, 548, 602, 847, 946, 959, 1204, 1507, 1694, 1892, 1918, 3014, 3311, 3388, 3836, 5203, 5891, 6028, 6622, 10406, 10549, 11782, 13244, 16577, 20812, 21098, 23564, 33154, 36421, 41237, 42196, 64801, 66308, 72842, 82474, 116039, 129602, 145684, 164948, 232078, 259204, 453607, 464156, 712811, 907214, 1425622, 1814428, 2851244, 4989677, 9979354, 19958708]

約数ペア:

[(1, 19958708), (2, 9979354), (4, 4989677), (7, 2851244), (11, 1814428), (14, 1425622), (22, 907214), (28, 712811), (43, 464156), (44, 453607), (77, 259204), (86, 232078), (121, 164948), (137, 145684), (154, 129602), (172, 116039), (242, 82474), (274, 72842), (301, 66308), (308, 64801), (473, 42196), (484, 41237), (548, 36421), (602, 33154), (847, 23564), (946, 21098), (959, 20812), (1204, 16577), (1507, 13244), (1694, 11782), (1892, 10549), (1918, 10406), (3014, 6622), (3311, 6028), (3388, 5891), (3836, 5203)]