21780270

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{271}}^1$

素因数の和:350

約数の個数: 96

約数和(自身を含む): 61102080

約数和(自身を除く): 39321810

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 19, 30, 38, 45, 47, 57, 90, 94, 95, 114, 141, 171, 190, 235, 271, 282, 285, 342, 423, 470, 542, 570, 705, 813, 846, 855, 893, 1355, 1410, 1626, 1710, 1786, 2115, 2439, 2679, 2710, 4065, 4230, 4465, 4878, 5149, 5358, 8037, 8130, 8930, 10298, 12195, 12737, 13395, 15447, 16074, 24390, 25474, 25745, 26790, 30894, 38211, 40185, 46341, 51490, 63685, 76422, 77235, 80370, 92682, 114633, 127370, 154470, 191055, 229266, 231705, 242003, 382110, 463410, 484006, 573165, 726009, 1146330, 1210015, 1452018, 2178027, 2420030, 3630045, 4356054, 7260090, 10890135, 21780270]

約数ペア:

[(1, 21780270), (2, 10890135), (3, 7260090), (5, 4356054), (6, 3630045), (9, 2420030), (10, 2178027), (15, 1452018), (18, 1210015), (19, 1146330), (30, 726009), (38, 573165), (45, 484006), (47, 463410), (57, 382110), (90, 242003), (94, 231705), (95, 229266), (114, 191055), (141, 154470), (171, 127370), (190, 114633), (235, 92682), (271, 80370), (282, 77235), (285, 76422), (342, 63685), (423, 51490), (470, 46341), (542, 40185), (570, 38211), (705, 30894), (813, 26790), (846, 25745), (855, 25474), (893, 24390), (1355, 16074), (1410, 15447), (1626, 13395), (1710, 12737), (1786, 12195), (2115, 10298), (2439, 8930), (2679, 8130), (2710, 8037), (4065, 5358), (4230, 5149), (4465, 4878)]