21880180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{373}}^1\times {\mathrm{419}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 52778880

約数和(自身を除く): 30898700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 373, 419, 746, 838, 1492, 1676, 1865, 2095, 2611, 2933, 3730, 4190, 5222, 5866, 7460, 8380, 10444, 11732, 13055, 14665, 26110, 29330, 52220, 58660, 156287, 312574, 625148, 781435, 1094009, 1562870, 2188018, 3125740, 4376036, 5470045, 10940090, 21880180]

約数ペア:

[(1, 21880180), (2, 10940090), (4, 5470045), (5, 4376036), (7, 3125740), (10, 2188018), (14, 1562870), (20, 1094009), (28, 781435), (35, 625148), (70, 312574), (140, 156287), (373, 58660), (419, 52220), (746, 29330), (838, 26110), (1492, 14665), (1676, 13055), (1865, 11732), (2095, 10444), (2611, 8380), (2933, 7460), (3730, 5866), (4190, 5222)]