19939760

素因数分解:

$2^4\times 5^1\times {\mathrm{281}}^1\times {\mathrm{887}}^1$

素因数の和:1181

約数の個数: 40

約数和(自身を含む): 46577376

約数和(自身を除く): 26637616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 281, 562, 887, 1124, 1405, 1774, 2248, 2810, 3548, 4435, 4496, 5620, 7096, 8870, 11240, 14192, 17740, 22480, 35480, 70960, 249247, 498494, 996988, 1246235, 1993976, 2492470, 3987952, 4984940, 9969880, 19939760]

約数ペア:

[(1, 19939760), (2, 9969880), (4, 4984940), (5, 3987952), (8, 2492470), (10, 1993976), (16, 1246235), (20, 996988), (40, 498494), (80, 249247), (281, 70960), (562, 35480), (887, 22480), (1124, 17740), (1405, 14192), (1774, 11240), (2248, 8870), (2810, 7096), (3548, 5620), (4435, 4496)]