21262420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{487}}^1$

素因数の和:592

約数の個数: 48

約数和(自身を含む): 46730880

約数和(自身を除く): 25468460

約数列:

[1, 2, 4, 5, 10, 20, 37, 59, 74, 118, 148, 185, 236, 295, 370, 487, 590, 740, 974, 1180, 1948, 2183, 2435, 4366, 4870, 8732, 9740, 10915, 18019, 21830, 28733, 36038, 43660, 57466, 72076, 90095, 114932, 143665, 180190, 287330, 360380, 574660, 1063121, 2126242, 4252484, 5315605, 10631210, 21262420]

約数ペア:

[(1, 21262420), (2, 10631210), (4, 5315605), (5, 4252484), (10, 2126242), (20, 1063121), (37, 574660), (59, 360380), (74, 287330), (118, 180190), (148, 143665), (185, 114932), (236, 90095), (295, 72076), (370, 57466), (487, 43660), (590, 36038), (740, 28733), (974, 21830), (1180, 18019), (1948, 10915), (2183, 9740), (2435, 8732), (4366, 4870)]