31421990

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1\times {\mathrm{443}}^1$

素因数の和:664

約数の個数: 32

約数和(自身を含む): 58405536

約数和(自身を除く): 26983546

約数列:

[1, 2, 5, 10, 41, 82, 173, 205, 346, 410, 443, 865, 886, 1730, 2215, 4430, 7093, 14186, 18163, 35465, 36326, 70930, 76639, 90815, 153278, 181630, 383195, 766390, 3142199, 6284398, 15710995, 31421990]

約数ペア:

[(1, 31421990), (2, 15710995), (5, 6284398), (10, 3142199), (41, 766390), (82, 383195), (173, 181630), (205, 153278), (346, 90815), (410, 76639), (443, 70930), (865, 36326), (886, 35465), (1730, 18163), (2215, 14186), (4430, 7093)]