172840420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{53}}^1\times {\mathrm{97}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 382960872

約数和(自身を除く): 210120452

約数列:

[1, 2, 4, 5, 10, 20, 41, 53, 82, 97, 106, 164, 194, 205, 212, 265, 388, 410, 485, 530, 820, 970, 1060, 1681, 1940, 2173, 3362, 3977, 4346, 5141, 6724, 7954, 8405, 8692, 10282, 10865, 15908, 16810, 19885, 20564, 21730, 25705, 33620, 39770, 43460, 51410, 79540, 89093, 102820, 163057, 178186, 210781, 326114, 356372, 421562, 445465, 652228, 815285, 843124, 890930, 1053905, 1630570, 1781860, 2107810, 3261140, 4215620, 8642021, 17284042, 34568084, 43210105, 86420210, 172840420]

約数ペア:

[(1, 172840420), (2, 86420210), (4, 43210105), (5, 34568084), (10, 17284042), (20, 8642021), (41, 4215620), (53, 3261140), (82, 2107810), (97, 1781860), (106, 1630570), (164, 1053905), (194, 890930), (205, 843124), (212, 815285), (265, 652228), (388, 445465), (410, 421562), (485, 356372), (530, 326114), (820, 210781), (970, 178186), (1060, 163057), (1681, 102820), (1940, 89093), (2173, 79540), (3362, 51410), (3977, 43460), (4346, 39770), (5141, 33620), (6724, 25705), (7954, 21730), (8405, 20564), (8692, 19885), (10282, 16810), (10865, 15908)]