19784740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16217}}^1$

素因数の和:16287

約数の個数: 24

約数和(自身を含む): 42231672

約数和(自身を除く): 22446932

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16217, 32434, 64868, 81085, 162170, 324340, 989237, 1978474, 3956948, 4946185, 9892370, 19784740]

約数ペア:

[(1, 19784740), (2, 9892370), (4, 4946185), (5, 3956948), (10, 1978474), (20, 989237), (61, 324340), (122, 162170), (244, 81085), (305, 64868), (610, 32434), (1220, 16217)]