21077840

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{283}}^1$

素因数の和:329

約数の個数: 120

約数和(自身を含む): 60219360

約数和(自身を除く): 39141520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 49, 56, 70, 76, 80, 95, 98, 112, 133, 140, 152, 190, 196, 245, 266, 280, 283, 304, 380, 392, 490, 532, 560, 566, 665, 760, 784, 931, 980, 1064, 1132, 1330, 1415, 1520, 1862, 1960, 1981, 2128, 2264, 2660, 2830, 3724, 3920, 3962, 4528, 4655, 5320, 5377, 5660, 7448, 7924, 9310, 9905, 10640, 10754, 11320, 13867, 14896, 15848, 18620, 19810, 21508, 22640, 26885, 27734, 31696, 37240, 37639, 39620, 43016, 53770, 55468, 69335, 74480, 75278, 79240, 86032, 107540, 110936, 138670, 150556, 158480, 188195, 215080, 221872, 263473, 277340, 301112, 376390, 430160, 526946, 554680, 602224, 752780, 1053892, 1109360, 1317365, 1505560, 2107784, 2634730, 3011120, 4215568, 5269460, 10538920, 21077840]

約数ペア:

[(1, 21077840), (2, 10538920), (4, 5269460), (5, 4215568), (7, 3011120), (8, 2634730), (10, 2107784), (14, 1505560), (16, 1317365), (19, 1109360), (20, 1053892), (28, 752780), (35, 602224), (38, 554680), (40, 526946), (49, 430160), (56, 376390), (70, 301112), (76, 277340), (80, 263473), (95, 221872), (98, 215080), (112, 188195), (133, 158480), (140, 150556), (152, 138670), (190, 110936), (196, 107540), (245, 86032), (266, 79240), (280, 75278), (283, 74480), (304, 69335), (380, 55468), (392, 53770), (490, 43016), (532, 39620), (560, 37639), (566, 37240), (665, 31696), (760, 27734), (784, 26885), (931, 22640), (980, 21508), (1064, 19810), (1132, 18620), (1330, 15848), (1415, 14896), (1520, 13867), (1862, 11320), (1960, 10754), (1981, 10640), (2128, 9905), (2264, 9310), (2660, 7924), (2830, 7448), (3724, 5660), (3920, 5377), (3962, 5320), (4528, 4655)]