21397320

素因数分解:

$2^3\times 3^2\times 5^1\times 7^2\times {\mathrm{1213}}^1$

素因数の和:1244

約数の個数: 144

約数和(自身を含む): 80961660

約数和(自身を除く): 59564340

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 49, 56, 60, 63, 70, 72, 84, 90, 98, 105, 120, 126, 140, 147, 168, 180, 196, 210, 245, 252, 280, 294, 315, 360, 392, 420, 441, 490, 504, 588, 630, 735, 840, 882, 980, 1176, 1213, 1260, 1470, 1764, 1960, 2205, 2426, 2520, 2940, 3528, 3639, 4410, 4852, 5880, 6065, 7278, 8491, 8820, 9704, 10917, 12130, 14556, 16982, 17640, 18195, 21834, 24260, 25473, 29112, 33964, 36390, 42455, 43668, 48520, 50946, 54585, 59437, 67928, 72780, 76419, 84910, 87336, 101892, 109170, 118874, 127365, 145560, 152838, 169820, 178311, 203784, 218340, 237748, 254730, 297185, 305676, 339640, 356622, 382095, 436680, 475496, 509460, 534933, 594370, 611352, 713244, 764190, 891555, 1018920, 1069866, 1188740, 1426488, 1528380, 1783110, 2139732, 2377480, 2674665, 3056760, 3566220, 4279464, 5349330, 7132440, 10698660, 21397320]

約数ペア:

[(1, 21397320), (2, 10698660), (3, 7132440), (4, 5349330), (5, 4279464), (6, 3566220), (7, 3056760), (8, 2674665), (9, 2377480), (10, 2139732), (12, 1783110), (14, 1528380), (15, 1426488), (18, 1188740), (20, 1069866), (21, 1018920), (24, 891555), (28, 764190), (30, 713244), (35, 611352), (36, 594370), (40, 534933), (42, 509460), (45, 475496), (49, 436680), (56, 382095), (60, 356622), (63, 339640), (70, 305676), (72, 297185), (84, 254730), (90, 237748), (98, 218340), (105, 203784), (120, 178311), (126, 169820), (140, 152838), (147, 145560), (168, 127365), (180, 118874), (196, 109170), (210, 101892), (245, 87336), (252, 84910), (280, 76419), (294, 72780), (315, 67928), (360, 59437), (392, 54585), (420, 50946), (441, 48520), (490, 43668), (504, 42455), (588, 36390), (630, 33964), (735, 29112), (840, 25473), (882, 24260), (980, 21834), (1176, 18195), (1213, 17640), (1260, 16982), (1470, 14556), (1764, 12130), (1960, 10917), (2205, 9704), (2426, 8820), (2520, 8491), (2940, 7278), (3528, 6065), (3639, 5880), (4410, 4852)]