20520760

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:141

約数の個数: 128

約数和(自身を含む): 54835200

約数和(自身を除く): 34314440

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 31, 38, 40, 52, 62, 65, 67, 76, 95, 104, 124, 130, 134, 152, 155, 190, 247, 248, 260, 268, 310, 335, 380, 403, 494, 520, 536, 589, 620, 670, 760, 806, 871, 988, 1178, 1235, 1240, 1273, 1340, 1612, 1742, 1976, 2015, 2077, 2356, 2470, 2546, 2680, 2945, 3224, 3484, 4030, 4154, 4355, 4712, 4940, 5092, 5890, 6365, 6968, 7657, 8060, 8308, 8710, 9880, 10184, 10385, 11780, 12730, 15314, 16120, 16549, 16616, 17420, 20770, 23560, 25460, 27001, 30628, 33098, 34840, 38285, 39463, 41540, 50920, 54002, 61256, 66196, 76570, 78926, 82745, 83080, 108004, 132392, 135005, 153140, 157852, 165490, 197315, 216008, 270010, 306280, 315704, 330980, 394630, 513019, 540020, 661960, 789260, 1026038, 1080040, 1578520, 2052076, 2565095, 4104152, 5130190, 10260380, 20520760]

約数ペア:

[(1, 20520760), (2, 10260380), (4, 5130190), (5, 4104152), (8, 2565095), (10, 2052076), (13, 1578520), (19, 1080040), (20, 1026038), (26, 789260), (31, 661960), (38, 540020), (40, 513019), (52, 394630), (62, 330980), (65, 315704), (67, 306280), (76, 270010), (95, 216008), (104, 197315), (124, 165490), (130, 157852), (134, 153140), (152, 135005), (155, 132392), (190, 108004), (247, 83080), (248, 82745), (260, 78926), (268, 76570), (310, 66196), (335, 61256), (380, 54002), (403, 50920), (494, 41540), (520, 39463), (536, 38285), (589, 34840), (620, 33098), (670, 30628), (760, 27001), (806, 25460), (871, 23560), (988, 20770), (1178, 17420), (1235, 16616), (1240, 16549), (1273, 16120), (1340, 15314), (1612, 12730), (1742, 11780), (1976, 10385), (2015, 10184), (2077, 9880), (2356, 8710), (2470, 8308), (2546, 8060), (2680, 7657), (2945, 6968), (3224, 6365), (3484, 5890), (4030, 5092), (4154, 4940), (4355, 4712)]