21103712

素因数分解:

$2^5\times 7^2\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:380

約数の個数: 72

約数和(自身を含む): 49613256

約数和(自身を除く): 28509544

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 43, 49, 56, 86, 98, 112, 172, 196, 224, 301, 313, 344, 392, 602, 626, 688, 784, 1204, 1252, 1376, 1568, 2107, 2191, 2408, 2504, 4214, 4382, 4816, 5008, 8428, 8764, 9632, 10016, 13459, 15337, 16856, 17528, 26918, 30674, 33712, 35056, 53836, 61348, 67424, 70112, 94213, 107672, 122696, 188426, 215344, 245392, 376852, 430688, 490784, 659491, 753704, 1318982, 1507408, 2637964, 3014816, 5275928, 10551856, 21103712]

約数ペア:

[(1, 21103712), (2, 10551856), (4, 5275928), (7, 3014816), (8, 2637964), (14, 1507408), (16, 1318982), (28, 753704), (32, 659491), (43, 490784), (49, 430688), (56, 376852), (86, 245392), (98, 215344), (112, 188426), (172, 122696), (196, 107672), (224, 94213), (301, 70112), (313, 67424), (344, 61348), (392, 53836), (602, 35056), (626, 33712), (688, 30674), (784, 26918), (1204, 17528), (1252, 16856), (1376, 15337), (1568, 13459), (2107, 10016), (2191, 9632), (2408, 8764), (2504, 8428), (4214, 5008), (4382, 4816)]