19995536

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:240

約数の個数: 80

約数和(自身を含む): 46122048

約数和(自身を除く): 26126512

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 34, 41, 44, 68, 82, 88, 136, 163, 164, 176, 187, 272, 326, 328, 374, 451, 652, 656, 697, 748, 902, 1304, 1394, 1496, 1793, 1804, 2608, 2771, 2788, 2992, 3586, 3608, 5542, 5576, 6683, 7172, 7216, 7667, 11084, 11152, 13366, 14344, 15334, 22168, 26732, 28688, 30481, 30668, 44336, 53464, 60962, 61336, 73513, 106928, 113611, 121924, 122672, 147026, 227222, 243848, 294052, 454444, 487696, 588104, 908888, 1176208, 1249721, 1817776, 2499442, 4998884, 9997768, 19995536]

約数ペア:

[(1, 19995536), (2, 9997768), (4, 4998884), (8, 2499442), (11, 1817776), (16, 1249721), (17, 1176208), (22, 908888), (34, 588104), (41, 487696), (44, 454444), (68, 294052), (82, 243848), (88, 227222), (136, 147026), (163, 122672), (164, 121924), (176, 113611), (187, 106928), (272, 73513), (326, 61336), (328, 60962), (374, 53464), (451, 44336), (652, 30668), (656, 30481), (697, 28688), (748, 26732), (902, 22168), (1304, 15334), (1394, 14344), (1496, 13366), (1793, 11152), (1804, 11084), (2608, 7667), (2771, 7216), (2788, 7172), (2992, 6683), (3586, 5576), (3608, 5542)]