21309568

素因数分解:

$2^7\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1399}}^1$

素因数の和:1437

約数の個数: 64

約数和(自身を含む): 51408000

約数和(自身を除く): 30098432

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 32, 34, 56, 64, 68, 112, 119, 128, 136, 224, 238, 272, 448, 476, 544, 896, 952, 1088, 1399, 1904, 2176, 2798, 3808, 5596, 7616, 9793, 11192, 15232, 19586, 22384, 23783, 39172, 44768, 47566, 78344, 89536, 95132, 156688, 166481, 179072, 190264, 313376, 332962, 380528, 626752, 665924, 761056, 1253504, 1331848, 1522112, 2663696, 3044224, 5327392, 10654784, 21309568]

約数ペア:

[(1, 21309568), (2, 10654784), (4, 5327392), (7, 3044224), (8, 2663696), (14, 1522112), (16, 1331848), (17, 1253504), (28, 761056), (32, 665924), (34, 626752), (56, 380528), (64, 332962), (68, 313376), (112, 190264), (119, 179072), (128, 166481), (136, 156688), (224, 95132), (238, 89536), (272, 78344), (448, 47566), (476, 44768), (544, 39172), (896, 23783), (952, 22384), (1088, 19586), (1399, 15232), (1904, 11192), (2176, 9793), (2798, 7616), (3808, 5596)]