21079890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{419}}^1$

素因数の和:488

約数の個数: 96

約数和(自身を含む): 60540480

約数和(自身を除く): 39460590

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 39, 43, 45, 65, 78, 86, 90, 117, 129, 130, 195, 215, 234, 258, 387, 390, 419, 430, 559, 585, 645, 774, 838, 1118, 1170, 1257, 1290, 1677, 1935, 2095, 2514, 2795, 3354, 3771, 3870, 4190, 5031, 5447, 5590, 6285, 7542, 8385, 10062, 10894, 12570, 16341, 16770, 18017, 18855, 25155, 27235, 32682, 36034, 37710, 49023, 50310, 54051, 54470, 81705, 90085, 98046, 108102, 162153, 163410, 180170, 234221, 245115, 270255, 324306, 468442, 490230, 540510, 702663, 810765, 1171105, 1405326, 1621530, 2107989, 2342210, 3513315, 4215978, 7026630, 10539945, 21079890]

約数ペア:

[(1, 21079890), (2, 10539945), (3, 7026630), (5, 4215978), (6, 3513315), (9, 2342210), (10, 2107989), (13, 1621530), (15, 1405326), (18, 1171105), (26, 810765), (30, 702663), (39, 540510), (43, 490230), (45, 468442), (65, 324306), (78, 270255), (86, 245115), (90, 234221), (117, 180170), (129, 163410), (130, 162153), (195, 108102), (215, 98046), (234, 90085), (258, 81705), (387, 54470), (390, 54051), (419, 50310), (430, 49023), (559, 37710), (585, 36034), (645, 32682), (774, 27235), (838, 25155), (1118, 18855), (1170, 18017), (1257, 16770), (1290, 16341), (1677, 12570), (1935, 10894), (2095, 10062), (2514, 8385), (2795, 7542), (3354, 6285), (3771, 5590), (3870, 5447), (4190, 5031)]