20795918

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:177

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 19120882

約数列:

[1, 2, 11, 13, 19, 22, 26, 38, 43, 86, 89, 143, 178, 209, 247, 286, 418, 473, 494, 559, 817, 946, 979, 1118, 1157, 1634, 1691, 1958, 2314, 2717, 3382, 3827, 5434, 6149, 7654, 8987, 10621, 12298, 12727, 17974, 18601, 21242, 21983, 25454, 37202, 42097, 43966, 49751, 72713, 84194, 99502, 116831, 145426, 233662, 241813, 483626, 547261, 799843, 945269, 1094522, 1599686, 1890538, 10397959, 20795918]

約数ペア:

[(1, 20795918), (2, 10397959), (11, 1890538), (13, 1599686), (19, 1094522), (22, 945269), (26, 799843), (38, 547261), (43, 483626), (86, 241813), (89, 233662), (143, 145426), (178, 116831), (209, 99502), (247, 84194), (286, 72713), (418, 49751), (473, 43966), (494, 42097), (559, 37202), (817, 25454), (946, 21983), (979, 21242), (1118, 18601), (1157, 17974), (1634, 12727), (1691, 12298), (1958, 10621), (2314, 8987), (2717, 7654), (3382, 6149), (3827, 5434)]