21378280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{631}}^1$

素因数の和:671

約数の個数: 96

約数和(自身を含む): 60520320

約数和(自身を除く): 39142040

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 121, 140, 154, 220, 242, 280, 308, 385, 440, 484, 605, 616, 631, 770, 847, 968, 1210, 1262, 1540, 1694, 2420, 2524, 3080, 3155, 3388, 4235, 4417, 4840, 5048, 6310, 6776, 6941, 8470, 8834, 12620, 13882, 16940, 17668, 22085, 25240, 27764, 33880, 34705, 35336, 44170, 48587, 55528, 69410, 76351, 88340, 97174, 138820, 152702, 176680, 194348, 242935, 277640, 305404, 381755, 388696, 485870, 534457, 610808, 763510, 971740, 1068914, 1527020, 1943480, 2137828, 2672285, 3054040, 4275656, 5344570, 10689140, 21378280]

約数ペア:

[(1, 21378280), (2, 10689140), (4, 5344570), (5, 4275656), (7, 3054040), (8, 2672285), (10, 2137828), (11, 1943480), (14, 1527020), (20, 1068914), (22, 971740), (28, 763510), (35, 610808), (40, 534457), (44, 485870), (55, 388696), (56, 381755), (70, 305404), (77, 277640), (88, 242935), (110, 194348), (121, 176680), (140, 152702), (154, 138820), (220, 97174), (242, 88340), (280, 76351), (308, 69410), (385, 55528), (440, 48587), (484, 44170), (605, 35336), (616, 34705), (631, 33880), (770, 27764), (847, 25240), (968, 22085), (1210, 17668), (1262, 16940), (1540, 13882), (1694, 12620), (2420, 8834), (2524, 8470), (3080, 6941), (3155, 6776), (3388, 6310), (4235, 5048), (4417, 4840)]