21525738

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 48771072

約数和(自身を除く): 27245334

約数列:

[1, 2, 3, 6, 13, 26, 39, 41, 53, 78, 82, 106, 123, 127, 159, 246, 254, 318, 381, 533, 689, 762, 1066, 1378, 1599, 1651, 2067, 2173, 3198, 3302, 4134, 4346, 4953, 5207, 6519, 6731, 9906, 10414, 13038, 13462, 15621, 20193, 28249, 31242, 40386, 56498, 67691, 84747, 87503, 135382, 169494, 175006, 203073, 262509, 275971, 406146, 525018, 551942, 827913, 1655826, 3587623, 7175246, 10762869, 21525738]

約数ペア:

[(1, 21525738), (2, 10762869), (3, 7175246), (6, 3587623), (13, 1655826), (26, 827913), (39, 551942), (41, 525018), (53, 406146), (78, 275971), (82, 262509), (106, 203073), (123, 175006), (127, 169494), (159, 135382), (246, 87503), (254, 84747), (318, 67691), (381, 56498), (533, 40386), (689, 31242), (762, 28249), (1066, 20193), (1378, 15621), (1599, 13462), (1651, 13038), (2067, 10414), (2173, 9906), (3198, 6731), (3302, 6519), (4134, 5207), (4346, 4953)]