20712780

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{317}}^1$

素因数の和:357

約数の個数: 144

約数和(自身を含む): 71053920

約数和(自身を除く): 50341140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 30, 33, 36, 44, 45, 54, 55, 60, 66, 90, 99, 108, 110, 121, 132, 135, 165, 180, 198, 220, 242, 270, 297, 317, 330, 363, 396, 484, 495, 540, 594, 605, 634, 660, 726, 951, 990, 1089, 1188, 1210, 1268, 1452, 1485, 1585, 1815, 1902, 1980, 2178, 2420, 2853, 2970, 3170, 3267, 3487, 3630, 3804, 4356, 4755, 5445, 5706, 5940, 6340, 6534, 6974, 7260, 8559, 9510, 10461, 10890, 11412, 13068, 13948, 14265, 16335, 17118, 17435, 19020, 20922, 21780, 28530, 31383, 32670, 34236, 34870, 38357, 41844, 42795, 52305, 57060, 62766, 65340, 69740, 76714, 85590, 94149, 104610, 115071, 125532, 153428, 156915, 171180, 188298, 191785, 209220, 230142, 313830, 345213, 376596, 383570, 460284, 470745, 575355, 627660, 690426, 767140, 941490, 1035639, 1150710, 1380852, 1726065, 1882980, 2071278, 2301420, 3452130, 4142556, 5178195, 6904260, 10356390, 20712780]

約数ペア:

[(1, 20712780), (2, 10356390), (3, 6904260), (4, 5178195), (5, 4142556), (6, 3452130), (9, 2301420), (10, 2071278), (11, 1882980), (12, 1726065), (15, 1380852), (18, 1150710), (20, 1035639), (22, 941490), (27, 767140), (30, 690426), (33, 627660), (36, 575355), (44, 470745), (45, 460284), (54, 383570), (55, 376596), (60, 345213), (66, 313830), (90, 230142), (99, 209220), (108, 191785), (110, 188298), (121, 171180), (132, 156915), (135, 153428), (165, 125532), (180, 115071), (198, 104610), (220, 94149), (242, 85590), (270, 76714), (297, 69740), (317, 65340), (330, 62766), (363, 57060), (396, 52305), (484, 42795), (495, 41844), (540, 38357), (594, 34870), (605, 34236), (634, 32670), (660, 31383), (726, 28530), (951, 21780), (990, 20922), (1089, 19020), (1188, 17435), (1210, 17118), (1268, 16335), (1452, 14265), (1485, 13948), (1585, 13068), (1815, 11412), (1902, 10890), (1980, 10461), (2178, 9510), (2420, 8559), (2853, 7260), (2970, 6974), (3170, 6534), (3267, 6340), (3487, 5940), (3630, 5706), (3804, 5445), (4356, 4755)]