21771520

素因数分解:

$2^8\times 5^1\times {\mathrm{73}}^1\times {\mathrm{233}}^1$

素因数の和:327

約数の個数: 72

約数和(自身を含む): 53090856

約数和(自身を除く): 31319336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 128, 146, 160, 233, 256, 292, 320, 365, 466, 584, 640, 730, 932, 1165, 1168, 1280, 1460, 1864, 2330, 2336, 2920, 3728, 4660, 4672, 5840, 7456, 9320, 9344, 11680, 14912, 17009, 18640, 18688, 23360, 29824, 34018, 37280, 46720, 59648, 68036, 74560, 85045, 93440, 136072, 149120, 170090, 272144, 298240, 340180, 544288, 680360, 1088576, 1360720, 2177152, 2721440, 4354304, 5442880, 10885760, 21771520]

約数ペア:

[(1, 21771520), (2, 10885760), (4, 5442880), (5, 4354304), (8, 2721440), (10, 2177152), (16, 1360720), (20, 1088576), (32, 680360), (40, 544288), (64, 340180), (73, 298240), (80, 272144), (128, 170090), (146, 149120), (160, 136072), (233, 93440), (256, 85045), (292, 74560), (320, 68036), (365, 59648), (466, 46720), (584, 37280), (640, 34018), (730, 29824), (932, 23360), (1165, 18688), (1168, 18640), (1280, 17009), (1460, 14912), (1864, 11680), (2330, 9344), (2336, 9320), (2920, 7456), (3728, 5840), (4660, 4672)]