20615400

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{881}}^1$

素因数の和:916

約数の個数: 144

約数和(自身を含む): 74643660

約数和(自身を除く): 54028260

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 25, 26, 30, 36, 39, 40, 45, 50, 52, 60, 65, 72, 75, 78, 90, 100, 104, 117, 120, 130, 150, 156, 180, 195, 200, 225, 234, 260, 300, 312, 325, 360, 390, 450, 468, 520, 585, 600, 650, 780, 881, 900, 936, 975, 1170, 1300, 1560, 1762, 1800, 1950, 2340, 2600, 2643, 2925, 3524, 3900, 4405, 4680, 5286, 5850, 7048, 7800, 7929, 8810, 10572, 11453, 11700, 13215, 15858, 17620, 21144, 22025, 22906, 23400, 26430, 31716, 34359, 35240, 39645, 44050, 45812, 52860, 57265, 63432, 66075, 68718, 79290, 88100, 91624, 103077, 105720, 114530, 132150, 137436, 158580, 171795, 176200, 198225, 206154, 229060, 264300, 274872, 286325, 317160, 343590, 396450, 412308, 458120, 515385, 528600, 572650, 687180, 792900, 824616, 858975, 1030770, 1145300, 1374360, 1585800, 1717950, 2061540, 2290600, 2576925, 3435900, 4123080, 5153850, 6871800, 10307700, 20615400]

約数ペア:

[(1, 20615400), (2, 10307700), (3, 6871800), (4, 5153850), (5, 4123080), (6, 3435900), (8, 2576925), (9, 2290600), (10, 2061540), (12, 1717950), (13, 1585800), (15, 1374360), (18, 1145300), (20, 1030770), (24, 858975), (25, 824616), (26, 792900), (30, 687180), (36, 572650), (39, 528600), (40, 515385), (45, 458120), (50, 412308), (52, 396450), (60, 343590), (65, 317160), (72, 286325), (75, 274872), (78, 264300), (90, 229060), (100, 206154), (104, 198225), (117, 176200), (120, 171795), (130, 158580), (150, 137436), (156, 132150), (180, 114530), (195, 105720), (200, 103077), (225, 91624), (234, 88100), (260, 79290), (300, 68718), (312, 66075), (325, 63432), (360, 57265), (390, 52860), (450, 45812), (468, 44050), (520, 39645), (585, 35240), (600, 34359), (650, 31716), (780, 26430), (881, 23400), (900, 22906), (936, 22025), (975, 21144), (1170, 17620), (1300, 15858), (1560, 13215), (1762, 11700), (1800, 11453), (1950, 10572), (2340, 8810), (2600, 7929), (2643, 7800), (2925, 7048), (3524, 5850), (3900, 5286), (4405, 4680)]