21392930

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{89}}^1$

素因数の和:195

約数の個数: 48

約数和(自身を含む): 42933240

約数和(自身を除く): 21540310

約数列:

[1, 2, 5, 10, 13, 26, 43, 65, 86, 89, 130, 178, 215, 430, 445, 559, 890, 1118, 1157, 1849, 2314, 2795, 3698, 3827, 5590, 5785, 7654, 9245, 11570, 18490, 19135, 24037, 38270, 48074, 49751, 99502, 120185, 164561, 240370, 248755, 329122, 497510, 822805, 1645610, 2139293, 4278586, 10696465, 21392930]

約数ペア:

[(1, 21392930), (2, 10696465), (5, 4278586), (10, 2139293), (13, 1645610), (26, 822805), (43, 497510), (65, 329122), (86, 248755), (89, 240370), (130, 164561), (178, 120185), (215, 99502), (430, 49751), (445, 48074), (559, 38270), (890, 24037), (1118, 19135), (1157, 18490), (1849, 11570), (2314, 9245), (2795, 7654), (3698, 5785), (3827, 5590)]