81988280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{113}}^1$

素因数の和:249

約数の個数: 128

約数和(自身を含む): 217183680

約数和(自身を除く): 135195400

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 55, 68, 85, 88, 97, 110, 113, 136, 170, 187, 194, 220, 226, 340, 374, 388, 440, 452, 485, 565, 680, 748, 776, 904, 935, 970, 1067, 1130, 1243, 1496, 1649, 1870, 1921, 1940, 2134, 2260, 2486, 3298, 3740, 3842, 3880, 4268, 4520, 4972, 5335, 6215, 6596, 7480, 7684, 8245, 8536, 9605, 9944, 10670, 10961, 12430, 13192, 15368, 16490, 18139, 19210, 21131, 21340, 21922, 24860, 32980, 36278, 38420, 42262, 42680, 43844, 49720, 54805, 65960, 72556, 76840, 84524, 87688, 90695, 105655, 109610, 120571, 145112, 169048, 181390, 186337, 211310, 219220, 241142, 362780, 372674, 422620, 438440, 482284, 602855, 725560, 745348, 845240, 931685, 964568, 1205710, 1490696, 1863370, 2049707, 2411420, 3726740, 4099414, 4822840, 7453480, 8198828, 10248535, 16397656, 20497070, 40994140, 81988280]

約数ペア:

[(1, 81988280), (2, 40994140), (4, 20497070), (5, 16397656), (8, 10248535), (10, 8198828), (11, 7453480), (17, 4822840), (20, 4099414), (22, 3726740), (34, 2411420), (40, 2049707), (44, 1863370), (55, 1490696), (68, 1205710), (85, 964568), (88, 931685), (97, 845240), (110, 745348), (113, 725560), (136, 602855), (170, 482284), (187, 438440), (194, 422620), (220, 372674), (226, 362780), (340, 241142), (374, 219220), (388, 211310), (440, 186337), (452, 181390), (485, 169048), (565, 145112), (680, 120571), (748, 109610), (776, 105655), (904, 90695), (935, 87688), (970, 84524), (1067, 76840), (1130, 72556), (1243, 65960), (1496, 54805), (1649, 49720), (1870, 43844), (1921, 42680), (1940, 42262), (2134, 38420), (2260, 36278), (2486, 32980), (3298, 24860), (3740, 21922), (3842, 21340), (3880, 21131), (4268, 19210), (4520, 18139), (4972, 16490), (5335, 15368), (6215, 13192), (6596, 12430), (7480, 10961), (7684, 10670), (8245, 9944), (8536, 9605)]