20501280

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{619}}^1$

素因数の和:663

約数の個数: 144

約数和(自身を含む): 73120320

約数和(自身を除く): 52619040

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 69, 72, 80, 90, 92, 96, 115, 120, 138, 144, 160, 180, 184, 207, 230, 240, 276, 288, 345, 360, 368, 414, 460, 480, 552, 619, 690, 720, 736, 828, 920, 1035, 1104, 1238, 1380, 1440, 1656, 1840, 1857, 2070, 2208, 2476, 2760, 3095, 3312, 3680, 3714, 4140, 4952, 5520, 5571, 6190, 6624, 7428, 8280, 9285, 9904, 11040, 11142, 12380, 14237, 14856, 16560, 18570, 19808, 22284, 24760, 27855, 28474, 29712, 33120, 37140, 42711, 44568, 49520, 55710, 56948, 59424, 71185, 74280, 85422, 89136, 99040, 111420, 113896, 128133, 142370, 148560, 170844, 178272, 213555, 222840, 227792, 256266, 284740, 297120, 341688, 427110, 445680, 455584, 512532, 569480, 640665, 683376, 854220, 891360, 1025064, 1138960, 1281330, 1366752, 1708440, 2050128, 2277920, 2562660, 3416880, 4100256, 5125320, 6833760, 10250640, 20501280]

約数ペア:

[(1, 20501280), (2, 10250640), (3, 6833760), (4, 5125320), (5, 4100256), (6, 3416880), (8, 2562660), (9, 2277920), (10, 2050128), (12, 1708440), (15, 1366752), (16, 1281330), (18, 1138960), (20, 1025064), (23, 891360), (24, 854220), (30, 683376), (32, 640665), (36, 569480), (40, 512532), (45, 455584), (46, 445680), (48, 427110), (60, 341688), (69, 297120), (72, 284740), (80, 256266), (90, 227792), (92, 222840), (96, 213555), (115, 178272), (120, 170844), (138, 148560), (144, 142370), (160, 128133), (180, 113896), (184, 111420), (207, 99040), (230, 89136), (240, 85422), (276, 74280), (288, 71185), (345, 59424), (360, 56948), (368, 55710), (414, 49520), (460, 44568), (480, 42711), (552, 37140), (619, 33120), (690, 29712), (720, 28474), (736, 27855), (828, 24760), (920, 22284), (1035, 19808), (1104, 18570), (1238, 16560), (1380, 14856), (1440, 14237), (1656, 12380), (1840, 11142), (1857, 11040), (2070, 9904), (2208, 9285), (2476, 8280), (2760, 7428), (3095, 6624), (3312, 6190), (3680, 5571), (3714, 5520), (4140, 4952)]