19993360

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:332

約数の個数: 80

約数和(自身を含む): 50233392

約数和(自身を除く): 30240032

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 61, 68, 80, 85, 122, 136, 170, 241, 244, 272, 305, 340, 482, 488, 610, 680, 964, 976, 1037, 1205, 1220, 1360, 1928, 2074, 2410, 2440, 3856, 4097, 4148, 4820, 4880, 5185, 8194, 8296, 9640, 10370, 14701, 16388, 16592, 19280, 20485, 20740, 29402, 32776, 40970, 41480, 58804, 65552, 73505, 81940, 82960, 117608, 147010, 163880, 235216, 249917, 294020, 327760, 499834, 588040, 999668, 1176080, 1249585, 1999336, 2499170, 3998672, 4998340, 9996680, 19993360]

約数ペア:

[(1, 19993360), (2, 9996680), (4, 4998340), (5, 3998672), (8, 2499170), (10, 1999336), (16, 1249585), (17, 1176080), (20, 999668), (34, 588040), (40, 499834), (61, 327760), (68, 294020), (80, 249917), (85, 235216), (122, 163880), (136, 147010), (170, 117608), (241, 82960), (244, 81940), (272, 73505), (305, 65552), (340, 58804), (482, 41480), (488, 40970), (610, 32776), (680, 29402), (964, 20740), (976, 20485), (1037, 19280), (1205, 16592), (1220, 16388), (1360, 14701), (1928, 10370), (2074, 9640), (2410, 8296), (2440, 8194), (3856, 5185), (4097, 4880), (4148, 4820)]