20990208

素因数分解:

$2^8\times 3^1\times {\mathrm{151}}^1\times {\mathrm{181}}^1$

素因数の和:351

約数の個数: 72

約数和(自身を含む): 56545216

約数和(自身を除く): 35555008

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 151, 181, 192, 256, 302, 362, 384, 453, 543, 604, 724, 768, 906, 1086, 1208, 1448, 1812, 2172, 2416, 2896, 3624, 4344, 4832, 5792, 7248, 8688, 9664, 11584, 14496, 17376, 19328, 23168, 27331, 28992, 34752, 38656, 46336, 54662, 57984, 69504, 81993, 109324, 115968, 139008, 163986, 218648, 327972, 437296, 655944, 874592, 1311888, 1749184, 2623776, 3498368, 5247552, 6996736, 10495104, 20990208]

約数ペア:

[(1, 20990208), (2, 10495104), (3, 6996736), (4, 5247552), (6, 3498368), (8, 2623776), (12, 1749184), (16, 1311888), (24, 874592), (32, 655944), (48, 437296), (64, 327972), (96, 218648), (128, 163986), (151, 139008), (181, 115968), (192, 109324), (256, 81993), (302, 69504), (362, 57984), (384, 54662), (453, 46336), (543, 38656), (604, 34752), (724, 28992), (768, 27331), (906, 23168), (1086, 19328), (1208, 17376), (1448, 14496), (1812, 11584), (2172, 9664), (2416, 8688), (2896, 7248), (3624, 5792), (4344, 4832)]