19779680

素因数分解:

$2^5\times 5^1\times {\mathrm{181}}^1\times {\mathrm{683}}^1$

素因数の和:879

約数の個数: 48

約数和(自身を含む): 47056464

約数和(自身を除く): 27276784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 181, 362, 683, 724, 905, 1366, 1448, 1810, 2732, 2896, 3415, 3620, 5464, 5792, 6830, 7240, 10928, 13660, 14480, 21856, 27320, 28960, 54640, 109280, 123623, 247246, 494492, 618115, 988984, 1236230, 1977968, 2472460, 3955936, 4944920, 9889840, 19779680]

約数ペア:

[(1, 19779680), (2, 9889840), (4, 4944920), (5, 3955936), (8, 2472460), (10, 1977968), (16, 1236230), (20, 988984), (32, 618115), (40, 494492), (80, 247246), (160, 123623), (181, 109280), (362, 54640), (683, 28960), (724, 27320), (905, 21856), (1366, 14480), (1448, 13660), (1810, 10928), (2732, 7240), (2896, 6830), (3415, 5792), (3620, 5464)]