19939820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{1109}}^1$

素因数の和:1178

約数の個数: 48

約数和(自身を含む): 44755200

約数和(自身を除く): 24815380

約数列:

[1, 2, 4, 5, 10, 20, 29, 31, 58, 62, 116, 124, 145, 155, 290, 310, 580, 620, 899, 1109, 1798, 2218, 3596, 4436, 4495, 5545, 8990, 11090, 17980, 22180, 32161, 34379, 64322, 68758, 128644, 137516, 160805, 171895, 321610, 343790, 643220, 687580, 996991, 1993982, 3987964, 4984955, 9969910, 19939820]

約数ペア:

[(1, 19939820), (2, 9969910), (4, 4984955), (5, 3987964), (10, 1993982), (20, 996991), (29, 687580), (31, 643220), (58, 343790), (62, 321610), (116, 171895), (124, 160805), (145, 137516), (155, 128644), (290, 68758), (310, 64322), (580, 34379), (620, 32161), (899, 22180), (1109, 17980), (1798, 11090), (2218, 8990), (3596, 5545), (4436, 4495)]