21358680

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{541}}^1$

素因数の和:609

約数の個数: 128

約数和(自身を含む): 74926080

約数和(自身を除く): 53567400

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 47, 56, 60, 70, 84, 94, 105, 120, 140, 141, 168, 188, 210, 235, 280, 282, 329, 376, 420, 470, 541, 564, 658, 705, 840, 940, 987, 1082, 1128, 1316, 1410, 1623, 1645, 1880, 1974, 2164, 2632, 2705, 2820, 3246, 3290, 3787, 3948, 4328, 4935, 5410, 5640, 6492, 6580, 7574, 7896, 8115, 9870, 10820, 11361, 12984, 13160, 15148, 16230, 18935, 19740, 21640, 22722, 25427, 30296, 32460, 37870, 39480, 45444, 50854, 56805, 64920, 75740, 76281, 90888, 101708, 113610, 127135, 151480, 152562, 177989, 203416, 227220, 254270, 305124, 355978, 381405, 454440, 508540, 533967, 610248, 711956, 762810, 889945, 1017080, 1067934, 1423912, 1525620, 1779890, 2135868, 2669835, 3051240, 3559780, 4271736, 5339670, 7119560, 10679340, 21358680]

約数ペア:

[(1, 21358680), (2, 10679340), (3, 7119560), (4, 5339670), (5, 4271736), (6, 3559780), (7, 3051240), (8, 2669835), (10, 2135868), (12, 1779890), (14, 1525620), (15, 1423912), (20, 1067934), (21, 1017080), (24, 889945), (28, 762810), (30, 711956), (35, 610248), (40, 533967), (42, 508540), (47, 454440), (56, 381405), (60, 355978), (70, 305124), (84, 254270), (94, 227220), (105, 203416), (120, 177989), (140, 152562), (141, 151480), (168, 127135), (188, 113610), (210, 101708), (235, 90888), (280, 76281), (282, 75740), (329, 64920), (376, 56805), (420, 50854), (470, 45444), (541, 39480), (564, 37870), (658, 32460), (705, 30296), (840, 25427), (940, 22722), (987, 21640), (1082, 19740), (1128, 18935), (1316, 16230), (1410, 15148), (1623, 13160), (1645, 12984), (1880, 11361), (1974, 10820), (2164, 9870), (2632, 8115), (2705, 7896), (2820, 7574), (3246, 6580), (3290, 6492), (3787, 5640), (3948, 5410), (4328, 4935)]