21198645

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:331

約数の個数: 64

約数和(自身を含む): 41610240

約数和(自身を除く): 20411595

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 47, 65, 117, 135, 141, 195, 235, 257, 351, 423, 585, 611, 705, 771, 1269, 1285, 1755, 1833, 2115, 2313, 3055, 3341, 3855, 5499, 6345, 6939, 9165, 10023, 11565, 12079, 16497, 16705, 27495, 30069, 34695, 36237, 50115, 60395, 82485, 90207, 108711, 150345, 157027, 181185, 326133, 451035, 471081, 543555, 785135, 1413243, 1630665, 2355405, 4239729, 7066215, 21198645]

約数ペア:

[(1, 21198645), (3, 7066215), (5, 4239729), (9, 2355405), (13, 1630665), (15, 1413243), (27, 785135), (39, 543555), (45, 471081), (47, 451035), (65, 326133), (117, 181185), (135, 157027), (141, 150345), (195, 108711), (235, 90207), (257, 82485), (351, 60395), (423, 50115), (585, 36237), (611, 34695), (705, 30069), (771, 27495), (1269, 16705), (1285, 16497), (1755, 12079), (1833, 11565), (2115, 10023), (2313, 9165), (3055, 6939), (3341, 6345), (3855, 5499)]