21438720

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{1861}}^1$

素因数の和:1888

約数の個数: 108

約数和(自身を含む): 74215596

約数和(自身を除く): 52776876

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 128, 144, 160, 180, 192, 240, 256, 288, 320, 360, 384, 480, 576, 640, 720, 768, 960, 1152, 1280, 1440, 1861, 1920, 2304, 2880, 3722, 3840, 5583, 5760, 7444, 9305, 11166, 11520, 14888, 16749, 18610, 22332, 27915, 29776, 33498, 37220, 44664, 55830, 59552, 66996, 74440, 83745, 89328, 111660, 119104, 133992, 148880, 167490, 178656, 223320, 238208, 267984, 297760, 334980, 357312, 446640, 476416, 535968, 595520, 669960, 714624, 893280, 1071936, 1191040, 1339920, 1429248, 1786560, 2143872, 2382080, 2679840, 3573120, 4287744, 5359680, 7146240, 10719360, 21438720]

約数ペア:

[(1, 21438720), (2, 10719360), (3, 7146240), (4, 5359680), (5, 4287744), (6, 3573120), (8, 2679840), (9, 2382080), (10, 2143872), (12, 1786560), (15, 1429248), (16, 1339920), (18, 1191040), (20, 1071936), (24, 893280), (30, 714624), (32, 669960), (36, 595520), (40, 535968), (45, 476416), (48, 446640), (60, 357312), (64, 334980), (72, 297760), (80, 267984), (90, 238208), (96, 223320), (120, 178656), (128, 167490), (144, 148880), (160, 133992), (180, 119104), (192, 111660), (240, 89328), (256, 83745), (288, 74440), (320, 66996), (360, 59552), (384, 55830), (480, 44664), (576, 37220), (640, 33498), (720, 29776), (768, 27915), (960, 22332), (1152, 18610), (1280, 16749), (1440, 14888), (1861, 11520), (1920, 11166), (2304, 9305), (2880, 7444), (3722, 5760), (3840, 5583)]