21982020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{937}}^1$

素因数の和:989

約数の個数: 96

約数和(自身を含む): 68076288

約数和(自身を除く): 46094268

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 23, 30, 34, 46, 51, 60, 68, 69, 85, 92, 102, 115, 138, 170, 204, 230, 255, 276, 340, 345, 391, 460, 510, 690, 782, 937, 1020, 1173, 1380, 1564, 1874, 1955, 2346, 2811, 3748, 3910, 4685, 4692, 5622, 5865, 7820, 9370, 11244, 11730, 14055, 15929, 18740, 21551, 23460, 28110, 31858, 43102, 47787, 56220, 63716, 64653, 79645, 86204, 95574, 107755, 129306, 159290, 191148, 215510, 238935, 258612, 318580, 323265, 366367, 431020, 477870, 646530, 732734, 955740, 1099101, 1293060, 1465468, 1831835, 2198202, 3663670, 4396404, 5495505, 7327340, 10991010, 21982020]

約数ペア:

[(1, 21982020), (2, 10991010), (3, 7327340), (4, 5495505), (5, 4396404), (6, 3663670), (10, 2198202), (12, 1831835), (15, 1465468), (17, 1293060), (20, 1099101), (23, 955740), (30, 732734), (34, 646530), (46, 477870), (51, 431020), (60, 366367), (68, 323265), (69, 318580), (85, 258612), (92, 238935), (102, 215510), (115, 191148), (138, 159290), (170, 129306), (204, 107755), (230, 95574), (255, 86204), (276, 79645), (340, 64653), (345, 63716), (391, 56220), (460, 47787), (510, 43102), (690, 31858), (782, 28110), (937, 23460), (1020, 21551), (1173, 18740), (1380, 15929), (1564, 14055), (1874, 11730), (1955, 11244), (2346, 9370), (2811, 7820), (3748, 5865), (3910, 5622), (4685, 4692)]