20815920

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{419}}^1$

素因数の和:464

約数の個数: 160

約数和(自身を含む): 74995200

約数和(自身を除く): 54179280

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, 414, 419, 432, 460, 540, 552, 621, 690, 720, 828, 838, 920, 1035, 1080, 1104, 1242, 1257, 1380, 1656, 1676, 1840, 2070, 2095, 2160, 2484, 2514, 2760, 3105, 3312, 3352, 3771, 4140, 4190, 4968, 5028, 5520, 6210, 6285, 6704, 7542, 8280, 8380, 9637, 9936, 10056, 11313, 12420, 12570, 15084, 16560, 16760, 18855, 19274, 20112, 22626, 24840, 25140, 28911, 30168, 33520, 37710, 38548, 45252, 48185, 49680, 50280, 56565, 57822, 60336, 75420, 77096, 86733, 90504, 96370, 100560, 113130, 115644, 144555, 150840, 154192, 173466, 181008, 192740, 226260, 231288, 260199, 289110, 301680, 346932, 385480, 433665, 452520, 462576, 520398, 578220, 693864, 770960, 867330, 905040, 1040796, 1156440, 1300995, 1387728, 1734660, 2081592, 2312880, 2601990, 3469320, 4163184, 5203980, 6938640, 10407960, 20815920]

約数ペア:

[(1, 20815920), (2, 10407960), (3, 6938640), (4, 5203980), (5, 4163184), (6, 3469320), (8, 2601990), (9, 2312880), (10, 2081592), (12, 1734660), (15, 1387728), (16, 1300995), (18, 1156440), (20, 1040796), (23, 905040), (24, 867330), (27, 770960), (30, 693864), (36, 578220), (40, 520398), (45, 462576), (46, 452520), (48, 433665), (54, 385480), (60, 346932), (69, 301680), (72, 289110), (80, 260199), (90, 231288), (92, 226260), (108, 192740), (115, 181008), (120, 173466), (135, 154192), (138, 150840), (144, 144555), (180, 115644), (184, 113130), (207, 100560), (216, 96370), (230, 90504), (240, 86733), (270, 77096), (276, 75420), (345, 60336), (360, 57822), (368, 56565), (414, 50280), (419, 49680), (432, 48185), (460, 45252), (540, 38548), (552, 37710), (621, 33520), (690, 30168), (720, 28911), (828, 25140), (838, 24840), (920, 22626), (1035, 20112), (1080, 19274), (1104, 18855), (1242, 16760), (1257, 16560), (1380, 15084), (1656, 12570), (1676, 12420), (1840, 11313), (2070, 10056), (2095, 9936), (2160, 9637), (2484, 8380), (2514, 8280), (2760, 7542), (3105, 6704), (3312, 6285), (3352, 6210), (3771, 5520), (4140, 5028), (4190, 4968)]