19881720

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{449}}^1$

素因数の和:510

約数の個数: 128

約数和(自身を含む): 68040000

約数和(自身を除く): 48158280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 41, 45, 54, 60, 72, 82, 90, 108, 120, 123, 135, 164, 180, 205, 216, 246, 270, 328, 360, 369, 410, 449, 492, 540, 615, 738, 820, 898, 984, 1080, 1107, 1230, 1347, 1476, 1640, 1796, 1845, 2214, 2245, 2460, 2694, 2952, 3592, 3690, 4041, 4428, 4490, 4920, 5388, 5535, 6735, 7380, 8082, 8856, 8980, 10776, 11070, 12123, 13470, 14760, 16164, 17960, 18409, 20205, 22140, 24246, 26940, 32328, 36818, 40410, 44280, 48492, 53880, 55227, 60615, 73636, 80820, 92045, 96984, 110454, 121230, 147272, 161640, 165681, 184090, 220908, 242460, 276135, 331362, 368180, 441816, 484920, 497043, 552270, 662724, 736360, 828405, 994086, 1104540, 1325448, 1656810, 1988172, 2209080, 2485215, 3313620, 3976344, 4970430, 6627240, 9940860, 19881720]

約数ペア:

[(1, 19881720), (2, 9940860), (3, 6627240), (4, 4970430), (5, 3976344), (6, 3313620), (8, 2485215), (9, 2209080), (10, 1988172), (12, 1656810), (15, 1325448), (18, 1104540), (20, 994086), (24, 828405), (27, 736360), (30, 662724), (36, 552270), (40, 497043), (41, 484920), (45, 441816), (54, 368180), (60, 331362), (72, 276135), (82, 242460), (90, 220908), (108, 184090), (120, 165681), (123, 161640), (135, 147272), (164, 121230), (180, 110454), (205, 96984), (216, 92045), (246, 80820), (270, 73636), (328, 60615), (360, 55227), (369, 53880), (410, 48492), (449, 44280), (492, 40410), (540, 36818), (615, 32328), (738, 26940), (820, 24246), (898, 22140), (984, 20205), (1080, 18409), (1107, 17960), (1230, 16164), (1347, 14760), (1476, 13470), (1640, 12123), (1796, 11070), (1845, 10776), (2214, 8980), (2245, 8856), (2460, 8082), (2694, 7380), (2952, 6735), (3592, 5535), (3690, 5388), (4041, 4920), (4428, 4490)]