21577640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:235

約数の個数: 96

約数和(自身を含む): 57558600

約数和(自身を除く): 35980960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 101, 109, 140, 196, 202, 218, 245, 280, 392, 404, 436, 490, 505, 545, 707, 763, 808, 872, 980, 1010, 1090, 1414, 1526, 1960, 2020, 2180, 2828, 3052, 3535, 3815, 4040, 4360, 4949, 5341, 5656, 6104, 7070, 7630, 9898, 10682, 11009, 14140, 15260, 19796, 21364, 22018, 24745, 26705, 28280, 30520, 39592, 42728, 44036, 49490, 53410, 55045, 77063, 88072, 98980, 106820, 110090, 154126, 197960, 213640, 220180, 308252, 385315, 440360, 539441, 616504, 770630, 1078882, 1541260, 2157764, 2697205, 3082520, 4315528, 5394410, 10788820, 21577640]

約数ペア:

[(1, 21577640), (2, 10788820), (4, 5394410), (5, 4315528), (7, 3082520), (8, 2697205), (10, 2157764), (14, 1541260), (20, 1078882), (28, 770630), (35, 616504), (40, 539441), (49, 440360), (56, 385315), (70, 308252), (98, 220180), (101, 213640), (109, 197960), (140, 154126), (196, 110090), (202, 106820), (218, 98980), (245, 88072), (280, 77063), (392, 55045), (404, 53410), (436, 49490), (490, 44036), (505, 42728), (545, 39592), (707, 30520), (763, 28280), (808, 26705), (872, 24745), (980, 22018), (1010, 21364), (1090, 19796), (1414, 15260), (1526, 14140), (1960, 11009), (2020, 10682), (2180, 9898), (2828, 7630), (3052, 7070), (3535, 6104), (3815, 5656), (4040, 5341), (4360, 4949)]