21356552

素因数分解:

$2^3\times 7^3\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:251

約数の個数: 64

約数和(自身を含む): 48048000

約数和(自身を除く): 26691448

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 49, 56, 86, 98, 172, 181, 196, 301, 343, 344, 362, 392, 602, 686, 724, 1204, 1267, 1372, 1448, 2107, 2408, 2534, 2744, 4214, 5068, 7783, 8428, 8869, 10136, 14749, 15566, 16856, 17738, 29498, 31132, 35476, 54481, 58996, 62083, 62264, 70952, 108962, 117992, 124166, 217924, 248332, 381367, 435848, 496664, 762734, 1525468, 2669569, 3050936, 5339138, 10678276, 21356552]

約数ペア:

[(1, 21356552), (2, 10678276), (4, 5339138), (7, 3050936), (8, 2669569), (14, 1525468), (28, 762734), (43, 496664), (49, 435848), (56, 381367), (86, 248332), (98, 217924), (172, 124166), (181, 117992), (196, 108962), (301, 70952), (343, 62264), (344, 62083), (362, 58996), (392, 54481), (602, 35476), (686, 31132), (724, 29498), (1204, 17738), (1267, 16856), (1372, 15566), (1448, 14749), (2107, 10136), (2408, 8869), (2534, 8428), (2744, 7783), (4214, 5068)]