21157656

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3989}}^1$

素因数の和:4028

約数の個数: 64

約数和(自身を含む): 60328800

約数和(自身を除く): 39171144

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 17, 24, 26, 34, 39, 51, 52, 68, 78, 102, 104, 136, 156, 204, 221, 312, 408, 442, 663, 884, 1326, 1768, 2652, 3989, 5304, 7978, 11967, 15956, 23934, 31912, 47868, 51857, 67813, 95736, 103714, 135626, 155571, 203439, 207428, 271252, 311142, 406878, 414856, 542504, 622284, 813756, 881569, 1244568, 1627512, 1763138, 2644707, 3526276, 5289414, 7052552, 10578828, 21157656]

約数ペア:

[(1, 21157656), (2, 10578828), (3, 7052552), (4, 5289414), (6, 3526276), (8, 2644707), (12, 1763138), (13, 1627512), (17, 1244568), (24, 881569), (26, 813756), (34, 622284), (39, 542504), (51, 414856), (52, 406878), (68, 311142), (78, 271252), (102, 207428), (104, 203439), (136, 155571), (156, 135626), (204, 103714), (221, 95736), (312, 67813), (408, 51857), (442, 47868), (663, 31912), (884, 23934), (1326, 15956), (1768, 11967), (2652, 7978), (3989, 5304)]