21293870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:309

約数の個数: 64

約数和(自身を含む): 44815680

約数和(自身を除く): 23521810

約数列:

[1, 2, 5, 10, 13, 19, 26, 37, 38, 65, 74, 95, 130, 185, 190, 233, 247, 370, 466, 481, 494, 703, 962, 1165, 1235, 1406, 2330, 2405, 2470, 3029, 3515, 4427, 4810, 6058, 7030, 8621, 8854, 9139, 15145, 17242, 18278, 22135, 30290, 43105, 44270, 45695, 57551, 86210, 91390, 112073, 115102, 163799, 224146, 287755, 327598, 560365, 575510, 818995, 1120730, 1637990, 2129387, 4258774, 10646935, 21293870]

約数ペア:

[(1, 21293870), (2, 10646935), (5, 4258774), (10, 2129387), (13, 1637990), (19, 1120730), (26, 818995), (37, 575510), (38, 560365), (65, 327598), (74, 287755), (95, 224146), (130, 163799), (185, 115102), (190, 112073), (233, 91390), (247, 86210), (370, 57551), (466, 45695), (481, 44270), (494, 43105), (703, 30290), (962, 22135), (1165, 18278), (1235, 17242), (1406, 15145), (2330, 9139), (2405, 8854), (2470, 8621), (3029, 7030), (3515, 6058), (4427, 4810)]