80836840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:255

約数の個数: 128

約数和(自身を含む): 219340800

約数和(自身を除く): 138503960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 67, 70, 124, 134, 139, 140, 155, 217, 248, 268, 278, 280, 310, 335, 434, 469, 536, 556, 620, 670, 695, 868, 938, 973, 1085, 1112, 1240, 1340, 1390, 1736, 1876, 1946, 2077, 2170, 2345, 2680, 2780, 3752, 3892, 4154, 4309, 4340, 4690, 4865, 5560, 7784, 8308, 8618, 8680, 9313, 9380, 9730, 10385, 14539, 16616, 17236, 18626, 18760, 19460, 20770, 21545, 29078, 30163, 34472, 37252, 38920, 41540, 43090, 46565, 58156, 60326, 65191, 72695, 74504, 83080, 86180, 93130, 116312, 120652, 130382, 145390, 150815, 172360, 186260, 241304, 260764, 288703, 290780, 301630, 325955, 372520, 521528, 577406, 581560, 603260, 651910, 1154812, 1206520, 1303820, 1443515, 2020921, 2309624, 2607640, 2887030, 4041842, 5774060, 8083684, 10104605, 11548120, 16167368, 20209210, 40418420, 80836840]

約数ペア:

[(1, 80836840), (2, 40418420), (4, 20209210), (5, 16167368), (7, 11548120), (8, 10104605), (10, 8083684), (14, 5774060), (20, 4041842), (28, 2887030), (31, 2607640), (35, 2309624), (40, 2020921), (56, 1443515), (62, 1303820), (67, 1206520), (70, 1154812), (124, 651910), (134, 603260), (139, 581560), (140, 577406), (155, 521528), (217, 372520), (248, 325955), (268, 301630), (278, 290780), (280, 288703), (310, 260764), (335, 241304), (434, 186260), (469, 172360), (536, 150815), (556, 145390), (620, 130382), (670, 120652), (695, 116312), (868, 93130), (938, 86180), (973, 83080), (1085, 74504), (1112, 72695), (1240, 65191), (1340, 60326), (1390, 58156), (1736, 46565), (1876, 43090), (1946, 41540), (2077, 38920), (2170, 37252), (2345, 34472), (2680, 30163), (2780, 29078), (3752, 21545), (3892, 20770), (4154, 19460), (4309, 18760), (4340, 18626), (4690, 17236), (4865, 16616), (5560, 14539), (7784, 10385), (8308, 9730), (8618, 9380), (8680, 9313)]