20921775

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{5693}}^1$

素因数の和:5720

約数の個数: 36

約数和(自身を含む): 40245192

約数和(自身を除く): 19323417

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 49, 75, 105, 147, 175, 245, 525, 735, 1225, 3675, 5693, 17079, 28465, 39851, 85395, 119553, 142325, 199255, 278957, 426975, 597765, 836871, 996275, 1394785, 2988825, 4184355, 6973925, 20921775]

約数ペア:

[(1, 20921775), (3, 6973925), (5, 4184355), (7, 2988825), (15, 1394785), (21, 996275), (25, 836871), (35, 597765), (49, 426975), (75, 278957), (105, 199255), (147, 142325), (175, 119553), (245, 85395), (525, 39851), (735, 28465), (1225, 17079), (3675, 5693)]