21978880

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1$

素因数の和:262

約数の個数: 144

約数和(自身を含む): 65931264

約数和(自身を除く): 43952384

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 64, 70, 77, 80, 88, 110, 112, 128, 140, 154, 160, 176, 220, 223, 224, 256, 280, 308, 320, 352, 385, 440, 446, 448, 560, 616, 640, 704, 770, 880, 892, 896, 1115, 1120, 1232, 1280, 1408, 1540, 1561, 1760, 1784, 1792, 2230, 2240, 2453, 2464, 2816, 3080, 3122, 3520, 3568, 4460, 4480, 4906, 4928, 6160, 6244, 7040, 7136, 7805, 8920, 8960, 9812, 9856, 12265, 12320, 12488, 14080, 14272, 15610, 17171, 17840, 19624, 19712, 24530, 24640, 24976, 28544, 31220, 34342, 35680, 39248, 49060, 49280, 49952, 57088, 62440, 68684, 71360, 78496, 85855, 98120, 98560, 99904, 124880, 137368, 142720, 156992, 171710, 196240, 199808, 249760, 274736, 285440, 313984, 343420, 392480, 399616, 499520, 549472, 627968, 686840, 784960, 999040, 1098944, 1373680, 1569920, 1998080, 2197888, 2747360, 3139840, 4395776, 5494720, 10989440, 21978880]

約数ペア:

[(1, 21978880), (2, 10989440), (4, 5494720), (5, 4395776), (7, 3139840), (8, 2747360), (10, 2197888), (11, 1998080), (14, 1569920), (16, 1373680), (20, 1098944), (22, 999040), (28, 784960), (32, 686840), (35, 627968), (40, 549472), (44, 499520), (55, 399616), (56, 392480), (64, 343420), (70, 313984), (77, 285440), (80, 274736), (88, 249760), (110, 199808), (112, 196240), (128, 171710), (140, 156992), (154, 142720), (160, 137368), (176, 124880), (220, 99904), (223, 98560), (224, 98120), (256, 85855), (280, 78496), (308, 71360), (320, 68684), (352, 62440), (385, 57088), (440, 49952), (446, 49280), (448, 49060), (560, 39248), (616, 35680), (640, 34342), (704, 31220), (770, 28544), (880, 24976), (892, 24640), (896, 24530), (1115, 19712), (1120, 19624), (1232, 17840), (1280, 17171), (1408, 15610), (1540, 14272), (1561, 14080), (1760, 12488), (1784, 12320), (1792, 12265), (2230, 9856), (2240, 9812), (2453, 8960), (2464, 8920), (2816, 7805), (3080, 7136), (3122, 7040), (3520, 6244), (3568, 6160), (4460, 4928), (4480, 4906)]