21915320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:165

約数の個数: 128

約数和(自身を含む): 60963840

約数和(自身を除く): 39048520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 41, 46, 56, 70, 82, 83, 92, 115, 140, 161, 164, 166, 184, 205, 230, 280, 287, 322, 328, 332, 410, 415, 460, 574, 581, 644, 664, 805, 820, 830, 920, 943, 1148, 1162, 1288, 1435, 1610, 1640, 1660, 1886, 1909, 2296, 2324, 2870, 2905, 3220, 3320, 3403, 3772, 3818, 4648, 4715, 5740, 5810, 6440, 6601, 6806, 7544, 7636, 9430, 9545, 11480, 11620, 13202, 13363, 13612, 15272, 17015, 18860, 19090, 23240, 23821, 26404, 26726, 27224, 33005, 34030, 37720, 38180, 47642, 52808, 53452, 66010, 66815, 68060, 76360, 78269, 95284, 106904, 119105, 132020, 133630, 136120, 156538, 190568, 238210, 264040, 267260, 313076, 391345, 476420, 534520, 547883, 626152, 782690, 952840, 1095766, 1565380, 2191532, 2739415, 3130760, 4383064, 5478830, 10957660, 21915320]

約数ペア:

[(1, 21915320), (2, 10957660), (4, 5478830), (5, 4383064), (7, 3130760), (8, 2739415), (10, 2191532), (14, 1565380), (20, 1095766), (23, 952840), (28, 782690), (35, 626152), (40, 547883), (41, 534520), (46, 476420), (56, 391345), (70, 313076), (82, 267260), (83, 264040), (92, 238210), (115, 190568), (140, 156538), (161, 136120), (164, 133630), (166, 132020), (184, 119105), (205, 106904), (230, 95284), (280, 78269), (287, 76360), (322, 68060), (328, 66815), (332, 66010), (410, 53452), (415, 52808), (460, 47642), (574, 38180), (581, 37720), (644, 34030), (664, 33005), (805, 27224), (820, 26726), (830, 26404), (920, 23821), (943, 23240), (1148, 19090), (1162, 18860), (1288, 17015), (1435, 15272), (1610, 13612), (1640, 13363), (1660, 13202), (1886, 11620), (1909, 11480), (2296, 9545), (2324, 9430), (2870, 7636), (2905, 7544), (3220, 6806), (3320, 6601), (3403, 6440), (3772, 5810), (3818, 5740), (4648, 4715)]