20813650

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:148

約数の個数: 96

約数和(自身を含む): 47246976

約数和(自身を除く): 26433326

約数列:

[1, 2, 5, 10, 11, 13, 22, 25, 26, 41, 50, 55, 65, 71, 82, 110, 130, 142, 143, 205, 275, 286, 325, 355, 410, 451, 533, 550, 650, 710, 715, 781, 902, 923, 1025, 1066, 1430, 1562, 1775, 1846, 2050, 2255, 2665, 2911, 3550, 3575, 3905, 4510, 4615, 5330, 5822, 5863, 7150, 7810, 9230, 10153, 11275, 11726, 13325, 14555, 19525, 20306, 22550, 23075, 26650, 29110, 29315, 32021, 37843, 39050, 46150, 50765, 58630, 64042, 72775, 75686, 101530, 145550, 146575, 160105, 189215, 253825, 293150, 320210, 378430, 416273, 507650, 800525, 832546, 946075, 1601050, 1892150, 2081365, 4162730, 10406825, 20813650]

約数ペア:

[(1, 20813650), (2, 10406825), (5, 4162730), (10, 2081365), (11, 1892150), (13, 1601050), (22, 946075), (25, 832546), (26, 800525), (41, 507650), (50, 416273), (55, 378430), (65, 320210), (71, 293150), (82, 253825), (110, 189215), (130, 160105), (142, 146575), (143, 145550), (205, 101530), (275, 75686), (286, 72775), (325, 64042), (355, 58630), (410, 50765), (451, 46150), (533, 39050), (550, 37843), (650, 32021), (710, 29315), (715, 29110), (781, 26650), (902, 23075), (923, 22550), (1025, 20306), (1066, 19525), (1430, 14555), (1562, 13325), (1775, 11726), (1846, 11275), (2050, 10153), (2255, 9230), (2665, 7810), (2911, 7150), (3550, 5863), (3575, 5822), (3905, 5330), (4510, 4615)]