640816920

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2039}}^1$

素因数の和:2159

約数の個数: 160

約数和(自身を含む): 2177128800

約数和(自身を除く): 1536311880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 97, 108, 120, 135, 162, 180, 194, 216, 270, 291, 324, 360, 388, 405, 485, 540, 582, 648, 776, 810, 873, 970, 1080, 1164, 1455, 1620, 1746, 1940, 2039, 2328, 2619, 2910, 3240, 3492, 3880, 4078, 4365, 5238, 5820, 6117, 6984, 7857, 8156, 8730, 10195, 10476, 11640, 12234, 13095, 15714, 16312, 17460, 18351, 20390, 20952, 24468, 26190, 30585, 31428, 34920, 36702, 39285, 40780, 48936, 52380, 55053, 61170, 62856, 73404, 78570, 81560, 91755, 104760, 110106, 122340, 146808, 157140, 165159, 183510, 197783, 220212, 244680, 275265, 314280, 330318, 367020, 395566, 440424, 550530, 593349, 660636, 734040, 791132, 825795, 988915, 1101060, 1186698, 1321272, 1582264, 1651590, 1780047, 1977830, 2202120, 2373396, 2966745, 3303180, 3560094, 3955660, 4746792, 5340141, 5933490, 6606360, 7120188, 7911320, 8900235, 10680282, 11866980, 14240376, 16020423, 17800470, 21360564, 23733960, 26700705, 32040846, 35600940, 42721128, 53401410, 64081692, 71201880, 80102115, 106802820, 128163384, 160204230, 213605640, 320408460, 640816920]

約数ペア:

[(1, 640816920), (2, 320408460), (3, 213605640), (4, 160204230), (5, 128163384), (6, 106802820), (8, 80102115), (9, 71201880), (10, 64081692), (12, 53401410), (15, 42721128), (18, 35600940), (20, 32040846), (24, 26700705), (27, 23733960), (30, 21360564), (36, 17800470), (40, 16020423), (45, 14240376), (54, 11866980), (60, 10680282), (72, 8900235), (81, 7911320), (90, 7120188), (97, 6606360), (108, 5933490), (120, 5340141), (135, 4746792), (162, 3955660), (180, 3560094), (194, 3303180), (216, 2966745), (270, 2373396), (291, 2202120), (324, 1977830), (360, 1780047), (388, 1651590), (405, 1582264), (485, 1321272), (540, 1186698), (582, 1101060), (648, 988915), (776, 825795), (810, 791132), (873, 734040), (970, 660636), (1080, 593349), (1164, 550530), (1455, 440424), (1620, 395566), (1746, 367020), (1940, 330318), (2039, 314280), (2328, 275265), (2619, 244680), (2910, 220212), (3240, 197783), (3492, 183510), (3880, 165159), (4078, 157140), (4365, 146808), (5238, 122340), (5820, 110106), (6117, 104760), (6984, 91755), (7857, 81560), (8156, 78570), (8730, 73404), (10195, 62856), (10476, 61170), (11640, 55053), (12234, 52380), (13095, 48936), (15714, 40780), (16312, 39285), (17460, 36702), (18351, 34920), (20390, 31428), (20952, 30585), (24468, 26190)]