80721520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{269}}^1$

素因数の和:335

約数の個数: 120

約数和(自身を含む): 213736320

約数和(自身を除く): 133014800

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 44, 55, 62, 80, 88, 110, 121, 124, 155, 176, 220, 242, 248, 269, 310, 341, 440, 484, 496, 538, 605, 620, 682, 880, 968, 1076, 1210, 1240, 1345, 1364, 1705, 1936, 2152, 2420, 2480, 2690, 2728, 2959, 3410, 3751, 4304, 4840, 5380, 5456, 5918, 6820, 7502, 8339, 9680, 10760, 11836, 13640, 14795, 15004, 16678, 18755, 21520, 23672, 27280, 29590, 30008, 32549, 33356, 37510, 41695, 47344, 59180, 60016, 65098, 66712, 75020, 83390, 91729, 118360, 130196, 133424, 150040, 162745, 166780, 183458, 236720, 260392, 300080, 325490, 333560, 366916, 458645, 520784, 650980, 667120, 733832, 917290, 1009019, 1301960, 1467664, 1834580, 2018038, 2603920, 3669160, 4036076, 5045095, 7338320, 8072152, 10090190, 16144304, 20180380, 40360760, 80721520]

約数ペア:

[(1, 80721520), (2, 40360760), (4, 20180380), (5, 16144304), (8, 10090190), (10, 8072152), (11, 7338320), (16, 5045095), (20, 4036076), (22, 3669160), (31, 2603920), (40, 2018038), (44, 1834580), (55, 1467664), (62, 1301960), (80, 1009019), (88, 917290), (110, 733832), (121, 667120), (124, 650980), (155, 520784), (176, 458645), (220, 366916), (242, 333560), (248, 325490), (269, 300080), (310, 260392), (341, 236720), (440, 183458), (484, 166780), (496, 162745), (538, 150040), (605, 133424), (620, 130196), (682, 118360), (880, 91729), (968, 83390), (1076, 75020), (1210, 66712), (1240, 65098), (1345, 60016), (1364, 59180), (1705, 47344), (1936, 41695), (2152, 37510), (2420, 33356), (2480, 32549), (2690, 30008), (2728, 29590), (2959, 27280), (3410, 23672), (3751, 21520), (4304, 18755), (4840, 16678), (5380, 15004), (5456, 14795), (5918, 13640), (6820, 11836), (7502, 10760), (8339, 9680)]