19987560

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:253

約数の個数: 160

約数和(自身を含む): 69696000

約数和(自身を除く): 49708440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 31, 36, 40, 45, 54, 60, 62, 72, 81, 90, 93, 108, 120, 124, 135, 155, 162, 180, 186, 199, 216, 248, 270, 279, 310, 324, 360, 372, 398, 405, 465, 540, 558, 597, 620, 648, 744, 796, 810, 837, 930, 995, 1080, 1116, 1194, 1240, 1395, 1592, 1620, 1674, 1791, 1860, 1990, 2232, 2388, 2511, 2790, 2985, 3240, 3348, 3582, 3720, 3980, 4185, 4776, 5022, 5373, 5580, 5970, 6169, 6696, 7164, 7960, 8370, 8955, 10044, 10746, 11160, 11940, 12338, 12555, 14328, 16119, 16740, 17910, 18507, 20088, 21492, 23880, 24676, 25110, 26865, 30845, 32238, 33480, 35820, 37014, 42984, 49352, 50220, 53730, 55521, 61690, 64476, 71640, 74028, 80595, 92535, 100440, 107460, 111042, 123380, 128952, 148056, 161190, 166563, 185070, 214920, 222084, 246760, 277605, 322380, 333126, 370140, 444168, 499689, 555210, 644760, 666252, 740280, 832815, 999378, 1110420, 1332504, 1665630, 1998756, 2220840, 2498445, 3331260, 3997512, 4996890, 6662520, 9993780, 19987560]

約数ペア:

[(1, 19987560), (2, 9993780), (3, 6662520), (4, 4996890), (5, 3997512), (6, 3331260), (8, 2498445), (9, 2220840), (10, 1998756), (12, 1665630), (15, 1332504), (18, 1110420), (20, 999378), (24, 832815), (27, 740280), (30, 666252), (31, 644760), (36, 555210), (40, 499689), (45, 444168), (54, 370140), (60, 333126), (62, 322380), (72, 277605), (81, 246760), (90, 222084), (93, 214920), (108, 185070), (120, 166563), (124, 161190), (135, 148056), (155, 128952), (162, 123380), (180, 111042), (186, 107460), (199, 100440), (216, 92535), (248, 80595), (270, 74028), (279, 71640), (310, 64476), (324, 61690), (360, 55521), (372, 53730), (398, 50220), (405, 49352), (465, 42984), (540, 37014), (558, 35820), (597, 33480), (620, 32238), (648, 30845), (744, 26865), (796, 25110), (810, 24676), (837, 23880), (930, 21492), (995, 20088), (1080, 18507), (1116, 17910), (1194, 16740), (1240, 16119), (1395, 14328), (1592, 12555), (1620, 12338), (1674, 11940), (1791, 11160), (1860, 10746), (1990, 10044), (2232, 8955), (2388, 8370), (2511, 7960), (2790, 7164), (2985, 6696), (3240, 6169), (3348, 5970), (3582, 5580), (3720, 5373), (3980, 5022), (4185, 4776)]