21388458

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{911}}^1$

素因数の和:979

約数の個数: 64

約数和(自身を含む): 53932032

約数和(自身を除く): 32543574

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 43, 78, 86, 91, 129, 182, 258, 273, 301, 546, 559, 602, 903, 911, 1118, 1677, 1806, 1822, 2733, 3354, 3913, 5466, 6377, 7826, 11739, 11843, 12754, 19131, 23478, 23686, 35529, 38262, 39173, 71058, 78346, 82901, 117519, 165802, 235038, 248703, 274211, 497406, 509249, 548422, 822633, 1018498, 1527747, 1645266, 3055494, 3564743, 7129486, 10694229, 21388458]

約数ペア:

[(1, 21388458), (2, 10694229), (3, 7129486), (6, 3564743), (7, 3055494), (13, 1645266), (14, 1527747), (21, 1018498), (26, 822633), (39, 548422), (42, 509249), (43, 497406), (78, 274211), (86, 248703), (91, 235038), (129, 165802), (182, 117519), (258, 82901), (273, 78346), (301, 71058), (546, 39173), (559, 38262), (602, 35529), (903, 23686), (911, 23478), (1118, 19131), (1677, 12754), (1806, 11843), (1822, 11739), (2733, 7826), (3354, 6377), (3913, 5466)]