21381984

素因数分解:

$2^5\times 3^2\times {\mathrm{13}}^1\times {\mathrm{5711}}^1$

素因数の和:5740

約数の個数: 72

約数和(自身を含む): 65493792

約数和(自身を除く): 44111808

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 13, 16, 18, 24, 26, 32, 36, 39, 48, 52, 72, 78, 96, 104, 117, 144, 156, 208, 234, 288, 312, 416, 468, 624, 936, 1248, 1872, 3744, 5711, 11422, 17133, 22844, 34266, 45688, 51399, 68532, 74243, 91376, 102798, 137064, 148486, 182752, 205596, 222729, 274128, 296972, 411192, 445458, 548256, 593944, 668187, 822384, 890916, 1187888, 1336374, 1644768, 1781832, 2375776, 2672748, 3563664, 5345496, 7127328, 10690992, 21381984]

約数ペア:

[(1, 21381984), (2, 10690992), (3, 7127328), (4, 5345496), (6, 3563664), (8, 2672748), (9, 2375776), (12, 1781832), (13, 1644768), (16, 1336374), (18, 1187888), (24, 890916), (26, 822384), (32, 668187), (36, 593944), (39, 548256), (48, 445458), (52, 411192), (72, 296972), (78, 274128), (96, 222729), (104, 205596), (117, 182752), (144, 148486), (156, 137064), (208, 102798), (234, 91376), (288, 74243), (312, 68532), (416, 51399), (468, 45688), (624, 34266), (936, 22844), (1248, 17133), (1872, 11422), (3744, 5711)]