21657950

素因数分解:

$2^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{509}}^1$

素因数の和:581

約数の個数: 48

約数和(自身を含む): 43256160

約数和(自身を除く): 21598210

約数列:

[1, 2, 5, 10, 23, 25, 37, 46, 50, 74, 115, 185, 230, 370, 509, 575, 851, 925, 1018, 1150, 1702, 1850, 2545, 4255, 5090, 8510, 11707, 12725, 18833, 21275, 23414, 25450, 37666, 42550, 58535, 94165, 117070, 188330, 292675, 433159, 470825, 585350, 866318, 941650, 2165795, 4331590, 10828975, 21657950]

約数ペア:

[(1, 21657950), (2, 10828975), (5, 4331590), (10, 2165795), (23, 941650), (25, 866318), (37, 585350), (46, 470825), (50, 433159), (74, 292675), (115, 188330), (185, 117070), (230, 94165), (370, 58535), (509, 42550), (575, 37666), (851, 25450), (925, 23414), (1018, 21275), (1150, 18833), (1702, 12725), (1850, 11707), (2545, 8510), (4255, 5090)]