19939680

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:309

約数の個数: 144

約数和(自身を含む): 69464304

約数和(自身を除く): 49524624

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 61, 72, 80, 90, 96, 120, 122, 144, 160, 180, 183, 227, 240, 244, 288, 305, 360, 366, 454, 480, 488, 549, 610, 681, 720, 732, 908, 915, 976, 1098, 1135, 1220, 1362, 1440, 1464, 1816, 1830, 1952, 2043, 2196, 2270, 2440, 2724, 2745, 2928, 3405, 3632, 3660, 4086, 4392, 4540, 4880, 5448, 5490, 5856, 6810, 7264, 7320, 8172, 8784, 9080, 9760, 10215, 10896, 10980, 13620, 13847, 14640, 16344, 17568, 18160, 20430, 21792, 21960, 27240, 27694, 29280, 32688, 36320, 40860, 41541, 43920, 54480, 55388, 65376, 69235, 81720, 83082, 87840, 108960, 110776, 124623, 138470, 163440, 166164, 207705, 221552, 249246, 276940, 326880, 332328, 415410, 443104, 498492, 553880, 623115, 664656, 830820, 996984, 1107760, 1246230, 1329312, 1661640, 1993968, 2215520, 2492460, 3323280, 3987936, 4984920, 6646560, 9969840, 19939680]

約数ペア:

[(1, 19939680), (2, 9969840), (3, 6646560), (4, 4984920), (5, 3987936), (6, 3323280), (8, 2492460), (9, 2215520), (10, 1993968), (12, 1661640), (15, 1329312), (16, 1246230), (18, 1107760), (20, 996984), (24, 830820), (30, 664656), (32, 623115), (36, 553880), (40, 498492), (45, 443104), (48, 415410), (60, 332328), (61, 326880), (72, 276940), (80, 249246), (90, 221552), (96, 207705), (120, 166164), (122, 163440), (144, 138470), (160, 124623), (180, 110776), (183, 108960), (227, 87840), (240, 83082), (244, 81720), (288, 69235), (305, 65376), (360, 55388), (366, 54480), (454, 43920), (480, 41541), (488, 40860), (549, 36320), (610, 32688), (681, 29280), (720, 27694), (732, 27240), (908, 21960), (915, 21792), (976, 20430), (1098, 18160), (1135, 17568), (1220, 16344), (1362, 14640), (1440, 13847), (1464, 13620), (1816, 10980), (1830, 10896), (1952, 10215), (2043, 9760), (2196, 9080), (2270, 8784), (2440, 8172), (2724, 7320), (2745, 7264), (2928, 6810), (3405, 5856), (3632, 5490), (3660, 5448), (4086, 4880), (4392, 4540)]