21888540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{277}}^1\times {\mathrm{439}}^1$

素因数の和:731

約数の個数: 72

約数和(自身を含む): 66786720

約数和(自身を除く): 44898180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 277, 439, 554, 831, 878, 1108, 1317, 1385, 1662, 1756, 2195, 2493, 2634, 2770, 3324, 3951, 4155, 4390, 4986, 5268, 5540, 6585, 7902, 8310, 8780, 9972, 12465, 13170, 15804, 16620, 19755, 24930, 26340, 39510, 49860, 79020, 121603, 243206, 364809, 486412, 608015, 729618, 1094427, 1216030, 1459236, 1824045, 2188854, 2432060, 3648090, 4377708, 5472135, 7296180, 10944270, 21888540]

約数ペア:

[(1, 21888540), (2, 10944270), (3, 7296180), (4, 5472135), (5, 4377708), (6, 3648090), (9, 2432060), (10, 2188854), (12, 1824045), (15, 1459236), (18, 1216030), (20, 1094427), (30, 729618), (36, 608015), (45, 486412), (60, 364809), (90, 243206), (180, 121603), (277, 79020), (439, 49860), (554, 39510), (831, 26340), (878, 24930), (1108, 19755), (1317, 16620), (1385, 15804), (1662, 13170), (1756, 12465), (2195, 9972), (2493, 8780), (2634, 8310), (2770, 7902), (3324, 6585), (3951, 5540), (4155, 5268), (4390, 4986)]