21557666

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{151}}^1$

素因数の和:219

約数の個数: 48

約数和(自身を含む): 39197760

約数和(自身を除く): 17640094

約数列:

[1, 2, 13, 17, 19, 26, 34, 38, 151, 221, 247, 289, 302, 323, 442, 494, 578, 646, 1963, 2567, 2869, 3757, 3926, 4199, 5134, 5491, 5738, 7514, 8398, 10982, 33371, 37297, 43639, 48773, 66742, 71383, 74594, 87278, 97546, 142766, 567307, 634049, 829141, 1134614, 1268098, 1658282, 10778833, 21557666]

約数ペア:

[(1, 21557666), (2, 10778833), (13, 1658282), (17, 1268098), (19, 1134614), (26, 829141), (34, 634049), (38, 567307), (151, 142766), (221, 97546), (247, 87278), (289, 74594), (302, 71383), (323, 66742), (442, 48773), (494, 43639), (578, 37297), (646, 33371), (1963, 10982), (2567, 8398), (2869, 7514), (3757, 5738), (3926, 5491), (4199, 5134)]