21538036

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{151}}^1\times {\mathrm{211}}^1$

素因数の和:392

約数の個数: 36

約数和(自身を含む): 41278944

約数和(自身を除く): 19740908

約数列:

[1, 2, 4, 13, 26, 52, 151, 169, 211, 302, 338, 422, 604, 676, 844, 1963, 2743, 3926, 5486, 7852, 10972, 25519, 31861, 35659, 51038, 63722, 71318, 102076, 127444, 142636, 414193, 828386, 1656772, 5384509, 10769018, 21538036]

約数ペア:

[(1, 21538036), (2, 10769018), (4, 5384509), (13, 1656772), (26, 828386), (52, 414193), (151, 142636), (169, 127444), (211, 102076), (302, 71318), (338, 63722), (422, 51038), (604, 35659), (676, 31861), (844, 25519), (1963, 10972), (2743, 7852), (3926, 5486)]