21155290

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{461}}^1$

素因数の和:834

約数の個数: 32

約数和(自身を含む): 41214096

約数和(自身を除く): 20058806

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 353, 461, 706, 922, 1765, 2305, 3530, 4589, 4610, 5993, 9178, 11986, 22945, 29965, 45890, 59930, 162733, 325466, 813665, 1627330, 2115529, 4231058, 10577645, 21155290]

約数ペア:

[(1, 21155290), (2, 10577645), (5, 4231058), (10, 2115529), (13, 1627330), (26, 813665), (65, 325466), (130, 162733), (353, 59930), (461, 45890), (706, 29965), (922, 22945), (1765, 11986), (2305, 9178), (3530, 5993), (4589, 4610)]