80707880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:211

約数の個数: 128

約数和(自身を含む): 209986560

約数和(自身を除く): 129278680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 61, 62, 88, 97, 110, 122, 124, 155, 194, 220, 244, 248, 305, 310, 341, 388, 440, 485, 488, 610, 620, 671, 682, 776, 970, 1067, 1220, 1240, 1342, 1364, 1705, 1891, 1940, 2134, 2440, 2684, 2728, 3007, 3355, 3410, 3782, 3880, 4268, 5335, 5368, 5917, 6014, 6710, 6820, 7564, 8536, 9455, 10670, 11834, 12028, 13420, 13640, 15035, 15128, 18910, 20801, 21340, 23668, 24056, 26840, 29585, 30070, 33077, 37820, 41602, 42680, 47336, 59170, 60140, 65087, 66154, 75640, 83204, 104005, 118340, 120280, 130174, 132308, 165385, 166408, 183427, 208010, 236680, 260348, 264616, 325435, 330770, 366854, 416020, 520696, 650870, 661540, 733708, 832040, 917135, 1301740, 1323080, 1467416, 1834270, 2017697, 2603480, 3668540, 4035394, 7337080, 8070788, 10088485, 16141576, 20176970, 40353940, 80707880]

約数ペア:

[(1, 80707880), (2, 40353940), (4, 20176970), (5, 16141576), (8, 10088485), (10, 8070788), (11, 7337080), (20, 4035394), (22, 3668540), (31, 2603480), (40, 2017697), (44, 1834270), (55, 1467416), (61, 1323080), (62, 1301740), (88, 917135), (97, 832040), (110, 733708), (122, 661540), (124, 650870), (155, 520696), (194, 416020), (220, 366854), (244, 330770), (248, 325435), (305, 264616), (310, 260348), (341, 236680), (388, 208010), (440, 183427), (485, 166408), (488, 165385), (610, 132308), (620, 130174), (671, 120280), (682, 118340), (776, 104005), (970, 83204), (1067, 75640), (1220, 66154), (1240, 65087), (1342, 60140), (1364, 59170), (1705, 47336), (1891, 42680), (1940, 41602), (2134, 37820), (2440, 33077), (2684, 30070), (2728, 29585), (3007, 26840), (3355, 24056), (3410, 23668), (3782, 21340), (3880, 20801), (4268, 18910), (5335, 15128), (5368, 15035), (5917, 13640), (6014, 13420), (6710, 12028), (6820, 11834), (7564, 10670), (8536, 9455)]