81278820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{257}}^1$

素因数の和:530

約数の個数: 144

約数和(自身を含む): 283989888

約数和(自身を除く): 202711068

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 251, 252, 257, 315, 420, 502, 514, 630, 753, 771, 1004, 1028, 1255, 1260, 1285, 1506, 1542, 1757, 1799, 2259, 2313, 2510, 2570, 3012, 3084, 3514, 3598, 3765, 3855, 4518, 4626, 5020, 5140, 5271, 5397, 7028, 7196, 7530, 7710, 8785, 8995, 9036, 9252, 10542, 10794, 11295, 11565, 15060, 15420, 15813, 16191, 17570, 17990, 21084, 21588, 22590, 23130, 26355, 26985, 31626, 32382, 35140, 35980, 45180, 46260, 52710, 53970, 63252, 64507, 64764, 79065, 80955, 105420, 107940, 129014, 158130, 161910, 193521, 258028, 316260, 322535, 323820, 387042, 451549, 580563, 645070, 774084, 903098, 967605, 1161126, 1290140, 1354647, 1806196, 1935210, 2257745, 2322252, 2709294, 2902815, 3870420, 4063941, 4515490, 5418588, 5805630, 6773235, 8127882, 9030980, 11611260, 13546470, 16255764, 20319705, 27092940, 40639410, 81278820]

約数ペア:

[(1, 81278820), (2, 40639410), (3, 27092940), (4, 20319705), (5, 16255764), (6, 13546470), (7, 11611260), (9, 9030980), (10, 8127882), (12, 6773235), (14, 5805630), (15, 5418588), (18, 4515490), (20, 4063941), (21, 3870420), (28, 2902815), (30, 2709294), (35, 2322252), (36, 2257745), (42, 1935210), (45, 1806196), (60, 1354647), (63, 1290140), (70, 1161126), (84, 967605), (90, 903098), (105, 774084), (126, 645070), (140, 580563), (180, 451549), (210, 387042), (251, 323820), (252, 322535), (257, 316260), (315, 258028), (420, 193521), (502, 161910), (514, 158130), (630, 129014), (753, 107940), (771, 105420), (1004, 80955), (1028, 79065), (1255, 64764), (1260, 64507), (1285, 63252), (1506, 53970), (1542, 52710), (1757, 46260), (1799, 45180), (2259, 35980), (2313, 35140), (2510, 32382), (2570, 31626), (3012, 26985), (3084, 26355), (3514, 23130), (3598, 22590), (3765, 21588), (3855, 21084), (4518, 17990), (4626, 17570), (5020, 16191), (5140, 15813), (5271, 15420), (5397, 15060), (7028, 11565), (7196, 11295), (7530, 10794), (7710, 10542), (8785, 9252), (8995, 9036)]