21555240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{383}}^1$

素因数の和:471

約数の個数: 128

約数和(自身を含む): 75202560

約数和(自身を除く): 53647320

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 67, 70, 84, 105, 120, 134, 140, 168, 201, 210, 268, 280, 335, 383, 402, 420, 469, 536, 670, 766, 804, 840, 938, 1005, 1149, 1340, 1407, 1532, 1608, 1876, 1915, 2010, 2298, 2345, 2680, 2681, 2814, 3064, 3752, 3830, 4020, 4596, 4690, 5362, 5628, 5745, 7035, 7660, 8040, 8043, 9192, 9380, 10724, 11256, 11490, 13405, 14070, 15320, 16086, 18760, 21448, 22980, 25661, 26810, 28140, 32172, 40215, 45960, 51322, 53620, 56280, 64344, 76983, 80430, 102644, 107240, 128305, 153966, 160860, 179627, 205288, 256610, 307932, 321720, 359254, 384915, 513220, 538881, 615864, 718508, 769830, 898135, 1026440, 1077762, 1437016, 1539660, 1796270, 2155524, 2694405, 3079320, 3592540, 4311048, 5388810, 7185080, 10777620, 21555240]

約数ペア:

[(1, 21555240), (2, 10777620), (3, 7185080), (4, 5388810), (5, 4311048), (6, 3592540), (7, 3079320), (8, 2694405), (10, 2155524), (12, 1796270), (14, 1539660), (15, 1437016), (20, 1077762), (21, 1026440), (24, 898135), (28, 769830), (30, 718508), (35, 615864), (40, 538881), (42, 513220), (56, 384915), (60, 359254), (67, 321720), (70, 307932), (84, 256610), (105, 205288), (120, 179627), (134, 160860), (140, 153966), (168, 128305), (201, 107240), (210, 102644), (268, 80430), (280, 76983), (335, 64344), (383, 56280), (402, 53620), (420, 51322), (469, 45960), (536, 40215), (670, 32172), (766, 28140), (804, 26810), (840, 25661), (938, 22980), (1005, 21448), (1149, 18760), (1340, 16086), (1407, 15320), (1532, 14070), (1608, 13405), (1876, 11490), (1915, 11256), (2010, 10724), (2298, 9380), (2345, 9192), (2680, 8043), (2681, 8040), (2814, 7660), (3064, 7035), (3752, 5745), (3830, 5628), (4020, 5362), (4596, 4690)]