21547840

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^2\times {\mathrm{233}}^1$

素因数の和:284

約数の個数: 84

約数和(自身を含む): 54740556

約数和(自身を除く): 33192716

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 233, 272, 289, 320, 340, 466, 544, 578, 680, 932, 1088, 1156, 1165, 1360, 1445, 1864, 2312, 2330, 2720, 2890, 3728, 3961, 4624, 4660, 5440, 5780, 7456, 7922, 9248, 9320, 11560, 14912, 15844, 18496, 18640, 19805, 23120, 31688, 37280, 39610, 46240, 63376, 67337, 74560, 79220, 92480, 126752, 134674, 158440, 253504, 269348, 316880, 336685, 538696, 633760, 673370, 1077392, 1267520, 1346740, 2154784, 2693480, 4309568, 5386960, 10773920, 21547840]

約数ペア:

[(1, 21547840), (2, 10773920), (4, 5386960), (5, 4309568), (8, 2693480), (10, 2154784), (16, 1346740), (17, 1267520), (20, 1077392), (32, 673370), (34, 633760), (40, 538696), (64, 336685), (68, 316880), (80, 269348), (85, 253504), (136, 158440), (160, 134674), (170, 126752), (233, 92480), (272, 79220), (289, 74560), (320, 67337), (340, 63376), (466, 46240), (544, 39610), (578, 37280), (680, 31688), (932, 23120), (1088, 19805), (1156, 18640), (1165, 18496), (1360, 15844), (1445, 14912), (1864, 11560), (2312, 9320), (2330, 9248), (2720, 7922), (2890, 7456), (3728, 5780), (3961, 5440), (4624, 4660)]