20784120

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:357

約数の個数: 128

約数和(自身を含む): 72230400

約数和(自身を除く): 51446280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 109, 120, 140, 168, 210, 218, 227, 280, 327, 420, 436, 454, 545, 654, 681, 763, 840, 872, 908, 1090, 1135, 1308, 1362, 1526, 1589, 1635, 1816, 2180, 2270, 2289, 2616, 2724, 3052, 3178, 3270, 3405, 3815, 4360, 4540, 4578, 4767, 5448, 6104, 6356, 6540, 6810, 7630, 7945, 9080, 9156, 9534, 11445, 12712, 13080, 13620, 15260, 15890, 18312, 19068, 22890, 23835, 24743, 27240, 30520, 31780, 38136, 45780, 47670, 49486, 63560, 74229, 91560, 95340, 98972, 123715, 148458, 173201, 190680, 197944, 247430, 296916, 346402, 371145, 494860, 519603, 593832, 692804, 742290, 866005, 989720, 1039206, 1385608, 1484580, 1732010, 2078412, 2598015, 2969160, 3464020, 4156824, 5196030, 6928040, 10392060, 20784120]

約数ペア:

[(1, 20784120), (2, 10392060), (3, 6928040), (4, 5196030), (5, 4156824), (6, 3464020), (7, 2969160), (8, 2598015), (10, 2078412), (12, 1732010), (14, 1484580), (15, 1385608), (20, 1039206), (21, 989720), (24, 866005), (28, 742290), (30, 692804), (35, 593832), (40, 519603), (42, 494860), (56, 371145), (60, 346402), (70, 296916), (84, 247430), (105, 197944), (109, 190680), (120, 173201), (140, 148458), (168, 123715), (210, 98972), (218, 95340), (227, 91560), (280, 74229), (327, 63560), (420, 49486), (436, 47670), (454, 45780), (545, 38136), (654, 31780), (681, 30520), (763, 27240), (840, 24743), (872, 23835), (908, 22890), (1090, 19068), (1135, 18312), (1308, 15890), (1362, 15260), (1526, 13620), (1589, 13080), (1635, 12712), (1816, 11445), (2180, 9534), (2270, 9156), (2289, 9080), (2616, 7945), (2724, 7630), (3052, 6810), (3178, 6540), (3270, 6356), (3405, 6104), (3815, 5448), (4360, 4767), (4540, 4578)]