18817280

素因数分解:

$2^8\times 5^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:323

約数の個数: 72

約数和(自身を含む): 46002264

約数和(自身を除く): 27184984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 241, 244, 256, 305, 320, 482, 488, 610, 640, 964, 976, 1205, 1220, 1280, 1928, 1952, 2410, 2440, 3856, 3904, 4820, 4880, 7712, 7808, 9640, 9760, 14701, 15424, 15616, 19280, 19520, 29402, 30848, 38560, 39040, 58804, 61696, 73505, 77120, 78080, 117608, 147010, 154240, 235216, 294020, 308480, 470432, 588040, 940864, 1176080, 1881728, 2352160, 3763456, 4704320, 9408640, 18817280]

約数ペア:

[(1, 18817280), (2, 9408640), (4, 4704320), (5, 3763456), (8, 2352160), (10, 1881728), (16, 1176080), (20, 940864), (32, 588040), (40, 470432), (61, 308480), (64, 294020), (80, 235216), (122, 154240), (128, 147010), (160, 117608), (241, 78080), (244, 77120), (256, 73505), (305, 61696), (320, 58804), (482, 39040), (488, 38560), (610, 30848), (640, 29402), (964, 19520), (976, 19280), (1205, 15616), (1220, 15424), (1280, 14701), (1928, 9760), (1952, 9640), (2410, 7808), (2440, 7712), (3856, 4880), (3904, 4820)]