21221760

素因数分解:

$2^7\times 3^1\times 5^1\times 7^1\times {\mathrm{1579}}^1$

素因数の和:1608

約数の個数: 128

約数和(自身を含む): 77356800

約数和(自身を除く): 56135040

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 210, 224, 240, 280, 320, 336, 384, 420, 448, 480, 560, 640, 672, 840, 896, 960, 1120, 1344, 1579, 1680, 1920, 2240, 2688, 3158, 3360, 4480, 4737, 6316, 6720, 7895, 9474, 11053, 12632, 13440, 15790, 18948, 22106, 23685, 25264, 31580, 33159, 37896, 44212, 47370, 50528, 55265, 63160, 66318, 75792, 88424, 94740, 101056, 110530, 126320, 132636, 151584, 165795, 176848, 189480, 202112, 221060, 252640, 265272, 303168, 331590, 353696, 378960, 442120, 505280, 530544, 606336, 663180, 707392, 757920, 884240, 1010560, 1061088, 1326360, 1414784, 1515840, 1768480, 2122176, 2652720, 3031680, 3536960, 4244352, 5305440, 7073920, 10610880, 21221760]

約数ペア:

[(1, 21221760), (2, 10610880), (3, 7073920), (4, 5305440), (5, 4244352), (6, 3536960), (7, 3031680), (8, 2652720), (10, 2122176), (12, 1768480), (14, 1515840), (15, 1414784), (16, 1326360), (20, 1061088), (21, 1010560), (24, 884240), (28, 757920), (30, 707392), (32, 663180), (35, 606336), (40, 530544), (42, 505280), (48, 442120), (56, 378960), (60, 353696), (64, 331590), (70, 303168), (80, 265272), (84, 252640), (96, 221060), (105, 202112), (112, 189480), (120, 176848), (128, 165795), (140, 151584), (160, 132636), (168, 126320), (192, 110530), (210, 101056), (224, 94740), (240, 88424), (280, 75792), (320, 66318), (336, 63160), (384, 55265), (420, 50528), (448, 47370), (480, 44212), (560, 37896), (640, 33159), (672, 31580), (840, 25264), (896, 23685), (960, 22106), (1120, 18948), (1344, 15790), (1579, 13440), (1680, 12632), (1920, 11053), (2240, 9474), (2688, 7895), (3158, 6720), (3360, 6316), (4480, 4737)]