20910560

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^2$

素因数の和:244

約数の個数: 72

約数和(自身を含む): 54391176

約数和(自身を除く): 33480616

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 109, 110, 160, 176, 218, 220, 352, 436, 440, 545, 872, 880, 1090, 1199, 1744, 1760, 2180, 2398, 3488, 4360, 4796, 5995, 8720, 9592, 11881, 11990, 17440, 19184, 23762, 23980, 38368, 47524, 47960, 59405, 95048, 95920, 118810, 130691, 190096, 191840, 237620, 261382, 380192, 475240, 522764, 653455, 950480, 1045528, 1306910, 1900960, 2091056, 2613820, 4182112, 5227640, 10455280, 20910560]

約数ペア:

[(1, 20910560), (2, 10455280), (4, 5227640), (5, 4182112), (8, 2613820), (10, 2091056), (11, 1900960), (16, 1306910), (20, 1045528), (22, 950480), (32, 653455), (40, 522764), (44, 475240), (55, 380192), (80, 261382), (88, 237620), (109, 191840), (110, 190096), (160, 130691), (176, 118810), (218, 95920), (220, 95048), (352, 59405), (436, 47960), (440, 47524), (545, 38368), (872, 23980), (880, 23762), (1090, 19184), (1199, 17440), (1744, 11990), (1760, 11881), (2180, 9592), (2398, 8720), (3488, 5995), (4360, 4796)]