20757960

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{109}}^1$

素因数の和:172

約数の個数: 144

約数和(自身を含む): 71171100

約数和(自身を除く): 50413140

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 23, 24, 30, 36, 40, 45, 46, 60, 69, 72, 90, 92, 109, 115, 120, 138, 180, 184, 207, 218, 230, 276, 327, 345, 360, 414, 436, 460, 529, 545, 552, 654, 690, 828, 872, 920, 981, 1035, 1058, 1090, 1308, 1380, 1587, 1635, 1656, 1962, 2070, 2116, 2180, 2507, 2616, 2645, 2760, 3174, 3270, 3924, 4140, 4232, 4360, 4761, 4905, 5014, 5290, 6348, 6540, 7521, 7848, 7935, 8280, 9522, 9810, 10028, 10580, 12535, 12696, 13080, 15042, 15870, 19044, 19620, 20056, 21160, 22563, 23805, 25070, 30084, 31740, 37605, 38088, 39240, 45126, 47610, 50140, 57661, 60168, 63480, 75210, 90252, 95220, 100280, 112815, 115322, 150420, 172983, 180504, 190440, 225630, 230644, 288305, 300840, 345966, 451260, 461288, 518949, 576610, 691932, 864915, 902520, 1037898, 1153220, 1383864, 1729830, 2075796, 2306440, 2594745, 3459660, 4151592, 5189490, 6919320, 10378980, 20757960]

約数ペア:

[(1, 20757960), (2, 10378980), (3, 6919320), (4, 5189490), (5, 4151592), (6, 3459660), (8, 2594745), (9, 2306440), (10, 2075796), (12, 1729830), (15, 1383864), (18, 1153220), (20, 1037898), (23, 902520), (24, 864915), (30, 691932), (36, 576610), (40, 518949), (45, 461288), (46, 451260), (60, 345966), (69, 300840), (72, 288305), (90, 230644), (92, 225630), (109, 190440), (115, 180504), (120, 172983), (138, 150420), (180, 115322), (184, 112815), (207, 100280), (218, 95220), (230, 90252), (276, 75210), (327, 63480), (345, 60168), (360, 57661), (414, 50140), (436, 47610), (460, 45126), (529, 39240), (545, 38088), (552, 37605), (654, 31740), (690, 30084), (828, 25070), (872, 23805), (920, 22563), (981, 21160), (1035, 20056), (1058, 19620), (1090, 19044), (1308, 15870), (1380, 15042), (1587, 13080), (1635, 12696), (1656, 12535), (1962, 10580), (2070, 10028), (2116, 9810), (2180, 9522), (2507, 8280), (2616, 7935), (2645, 7848), (2760, 7521), (3174, 6540), (3270, 6348), (3924, 5290), (4140, 5014), (4232, 4905), (4360, 4761)]