21420720

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1$

素因数の和:280

約数の個数: 160

約数和(自身を含む): 75709440

約数和(自身を除く): 54288720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 47, 48, 54, 60, 72, 80, 90, 94, 108, 120, 135, 141, 144, 180, 188, 211, 216, 235, 240, 270, 282, 360, 376, 422, 423, 432, 470, 540, 564, 633, 705, 720, 752, 844, 846, 940, 1055, 1080, 1128, 1266, 1269, 1410, 1688, 1692, 1880, 1899, 2110, 2115, 2160, 2256, 2532, 2538, 2820, 3165, 3376, 3384, 3760, 3798, 4220, 4230, 5064, 5076, 5640, 5697, 6330, 6345, 6768, 7596, 8440, 8460, 9495, 9917, 10128, 10152, 11280, 11394, 12660, 12690, 15192, 16880, 16920, 18990, 19834, 20304, 22788, 25320, 25380, 28485, 29751, 30384, 33840, 37980, 39668, 45576, 49585, 50640, 50760, 56970, 59502, 75960, 79336, 89253, 91152, 99170, 101520, 113940, 119004, 148755, 151920, 158672, 178506, 198340, 227880, 238008, 267759, 297510, 357012, 396680, 446265, 455760, 476016, 535518, 595020, 714024, 793360, 892530, 1071036, 1190040, 1338795, 1428048, 1785060, 2142072, 2380080, 2677590, 3570120, 4284144, 5355180, 7140240, 10710360, 21420720]

約数ペア:

[(1, 21420720), (2, 10710360), (3, 7140240), (4, 5355180), (5, 4284144), (6, 3570120), (8, 2677590), (9, 2380080), (10, 2142072), (12, 1785060), (15, 1428048), (16, 1338795), (18, 1190040), (20, 1071036), (24, 892530), (27, 793360), (30, 714024), (36, 595020), (40, 535518), (45, 476016), (47, 455760), (48, 446265), (54, 396680), (60, 357012), (72, 297510), (80, 267759), (90, 238008), (94, 227880), (108, 198340), (120, 178506), (135, 158672), (141, 151920), (144, 148755), (180, 119004), (188, 113940), (211, 101520), (216, 99170), (235, 91152), (240, 89253), (270, 79336), (282, 75960), (360, 59502), (376, 56970), (422, 50760), (423, 50640), (432, 49585), (470, 45576), (540, 39668), (564, 37980), (633, 33840), (705, 30384), (720, 29751), (752, 28485), (844, 25380), (846, 25320), (940, 22788), (1055, 20304), (1080, 19834), (1128, 18990), (1266, 16920), (1269, 16880), (1410, 15192), (1688, 12690), (1692, 12660), (1880, 11394), (1899, 11280), (2110, 10152), (2115, 10128), (2160, 9917), (2256, 9495), (2532, 8460), (2538, 8440), (2820, 7596), (3165, 6768), (3376, 6345), (3384, 6330), (3760, 5697), (3798, 5640), (4220, 5076), (4230, 5064)]