21747320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{769}}^1$

素因数の和:888

約数の個数: 64

約数和(自身を含む): 56548800

約数和(自身を除く): 34801480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 101, 140, 202, 280, 404, 505, 707, 769, 808, 1010, 1414, 1538, 2020, 2828, 3076, 3535, 3845, 4040, 5383, 5656, 6152, 7070, 7690, 10766, 14140, 15380, 21532, 26915, 28280, 30760, 43064, 53830, 77669, 107660, 155338, 215320, 310676, 388345, 543683, 621352, 776690, 1087366, 1553380, 2174732, 2718415, 3106760, 4349464, 5436830, 10873660, 21747320]

約数ペア:

[(1, 21747320), (2, 10873660), (4, 5436830), (5, 4349464), (7, 3106760), (8, 2718415), (10, 2174732), (14, 1553380), (20, 1087366), (28, 776690), (35, 621352), (40, 543683), (56, 388345), (70, 310676), (101, 215320), (140, 155338), (202, 107660), (280, 77669), (404, 53830), (505, 43064), (707, 30760), (769, 28280), (808, 26915), (1010, 21532), (1414, 15380), (1538, 14140), (2020, 10766), (2828, 7690), (3076, 7070), (3535, 6152), (3845, 5656), (4040, 5383)]