19921680

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1$

素因数の和:446

約数の個数: 160

約数和(自身を含む): 71781120

約数和(自身を除く): 51859440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 27, 30, 36, 40, 45, 46, 48, 54, 60, 69, 72, 80, 90, 92, 108, 115, 120, 135, 138, 144, 180, 184, 207, 216, 230, 240, 270, 276, 345, 360, 368, 401, 414, 432, 460, 540, 552, 621, 690, 720, 802, 828, 920, 1035, 1080, 1104, 1203, 1242, 1380, 1604, 1656, 1840, 2005, 2070, 2160, 2406, 2484, 2760, 3105, 3208, 3312, 3609, 4010, 4140, 4812, 4968, 5520, 6015, 6210, 6416, 7218, 8020, 8280, 9223, 9624, 9936, 10827, 12030, 12420, 14436, 16040, 16560, 18045, 18446, 19248, 21654, 24060, 24840, 27669, 28872, 32080, 36090, 36892, 43308, 46115, 48120, 49680, 54135, 55338, 57744, 72180, 73784, 83007, 86616, 92230, 96240, 108270, 110676, 138345, 144360, 147568, 166014, 173232, 184460, 216540, 221352, 249021, 276690, 288720, 332028, 368920, 415035, 433080, 442704, 498042, 553380, 664056, 737840, 830070, 866160, 996084, 1106760, 1245105, 1328112, 1660140, 1992168, 2213520, 2490210, 3320280, 3984336, 4980420, 6640560, 9960840, 19921680]

約数ペア:

[(1, 19921680), (2, 9960840), (3, 6640560), (4, 4980420), (5, 3984336), (6, 3320280), (8, 2490210), (9, 2213520), (10, 1992168), (12, 1660140), (15, 1328112), (16, 1245105), (18, 1106760), (20, 996084), (23, 866160), (24, 830070), (27, 737840), (30, 664056), (36, 553380), (40, 498042), (45, 442704), (46, 433080), (48, 415035), (54, 368920), (60, 332028), (69, 288720), (72, 276690), (80, 249021), (90, 221352), (92, 216540), (108, 184460), (115, 173232), (120, 166014), (135, 147568), (138, 144360), (144, 138345), (180, 110676), (184, 108270), (207, 96240), (216, 92230), (230, 86616), (240, 83007), (270, 73784), (276, 72180), (345, 57744), (360, 55338), (368, 54135), (401, 49680), (414, 48120), (432, 46115), (460, 43308), (540, 36892), (552, 36090), (621, 32080), (690, 28872), (720, 27669), (802, 24840), (828, 24060), (920, 21654), (1035, 19248), (1080, 18446), (1104, 18045), (1203, 16560), (1242, 16040), (1380, 14436), (1604, 12420), (1656, 12030), (1840, 10827), (2005, 9936), (2070, 9624), (2160, 9223), (2406, 8280), (2484, 8020), (2760, 7218), (3105, 6416), (3208, 6210), (3312, 6015), (3609, 5520), (4010, 4968), (4140, 4812)]